20784467840

素因数分解:

$2^7\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{887}}^1$

素因数の和:1013

約数の個数: 256

約数和(自身を含む): 54780364800

約数和(自身を除く): 33995896960

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 32, 38, 40, 41, 47, 64, 76, 80, 82, 94, 95, 128, 152, 160, 164, 188, 190, 205, 235, 304, 320, 328, 376, 380, 410, 470, 608, 640, 656, 752, 760, 779, 820, 887, 893, 940, 1216, 1312, 1504, 1520, 1558, 1640, 1774, 1786, 1880, 1927, 2432, 2624, 3008, 3040, 3116, 3280, 3548, 3572, 3760, 3854, 3895, 4435, 4465, 5248, 6016, 6080, 6232, 6560, 7096, 7144, 7520, 7708, 7790, 8870, 8930, 9635, 12160, 12464, 13120, 14192, 14288, 15040, 15416, 15580, 16853, 17740, 17860, 19270, 24928, 26240, 28384, 28576, 30080, 30832, 31160, 33706, 35480, 35720, 36367, 36613, 38540, 41689, 49856, 56768, 57152, 61664, 62320, 67412, 70960, 71440, 72734, 73226, 77080, 83378, 84265, 99712, 113536, 114304, 123328, 124640, 134824, 141920, 142880, 145468, 146452, 154160, 166756, 168530, 181835, 183065, 208445, 246656, 249280, 269648, 283840, 285760, 290936, 292904, 308320, 333512, 337060, 363670, 366130, 416890, 498560, 539296, 567680, 571520, 581872, 585808, 616640, 667024, 674120, 690973, 727340, 732260, 792091, 833780, 1078592, 1163744, 1171616, 1233280, 1334048, 1348240, 1381946, 1454680, 1464520, 1584182, 1667560, 1709249, 2157184, 2327488, 2343232, 2668096, 2696480, 2763892, 2909360, 2929040, 3168364, 3335120, 3418498, 3454865, 3960455, 4654976, 4686464, 5336192, 5392960, 5527784, 5818720, 5858080, 6336728, 6670240, 6836996, 6909730, 7920910, 8546245, 10785920, 11055568, 11637440, 11716160, 12673456, 13340480, 13673992, 13819460, 15841820, 17092490, 22111136, 23274880, 23432320, 25346912, 26680960, 27347984, 27638920, 31683640, 32475731, 34184980, 44222272, 50693824, 54695968, 55277840, 63367280, 64951462, 68369960, 88444544, 101387648, 109391936, 110555680, 126734560, 129902924, 136739920, 162378655, 218783872, 221111360, 253469120, 259805848, 273479840, 324757310, 442222720, 506938240, 519611696, 546959680, 649514620, 1039223392, 1093919360, 1299029240, 2078446784, 2598058480, 4156893568, 5196116960, 10392233920, 20784467840]

約数ペア:

[(1, 20784467840), (2, 10392233920), (4, 5196116960), (5, 4156893568), (8, 2598058480), (10, 2078446784), (16, 1299029240), (19, 1093919360), (20, 1039223392), (32, 649514620), (38, 546959680), (40, 519611696), (41, 506938240), (47, 442222720), (64, 324757310), (76, 273479840), (80, 259805848), (82, 253469120), (94, 221111360), (95, 218783872), (128, 162378655), (152, 136739920), (160, 129902924), (164, 126734560), (188, 110555680), (190, 109391936), (205, 101387648), (235, 88444544), (304, 68369960), (320, 64951462), (328, 63367280), (376, 55277840), (380, 54695968), (410, 50693824), (470, 44222272), (608, 34184980), (640, 32475731), (656, 31683640), (752, 27638920), (760, 27347984), (779, 26680960), (820, 25346912), (887, 23432320), (893, 23274880), (940, 22111136), (1216, 17092490), (1312, 15841820), (1504, 13819460), (1520, 13673992), (1558, 13340480), (1640, 12673456), (1774, 11716160), (1786, 11637440), (1880, 11055568), (1927, 10785920), (2432, 8546245), (2624, 7920910), (3008, 6909730), (3040, 6836996), (3116, 6670240), (3280, 6336728), (3548, 5858080), (3572, 5818720), (3760, 5527784), (3854, 5392960), (3895, 5336192), (4435, 4686464), (4465, 4654976), (5248, 3960455), (6016, 3454865), (6080, 3418498), (6232, 3335120), (6560, 3168364), (7096, 2929040), (7144, 2909360), (7520, 2763892), (7708, 2696480), (7790, 2668096), (8870, 2343232), (8930, 2327488), (9635, 2157184), (12160, 1709249), (12464, 1667560), (13120, 1584182), (14192, 1464520), (14288, 1454680), (15040, 1381946), (15416, 1348240), (15580, 1334048), (16853, 1233280), (17740, 1171616), (17860, 1163744), (19270, 1078592), (24928, 833780), (26240, 792091), (28384, 732260), (28576, 727340), (30080, 690973), (30832, 674120), (31160, 667024), (33706, 616640), (35480, 585808), (35720, 581872), (36367, 571520), (36613, 567680), (38540, 539296), (41689, 498560), (49856, 416890), (56768, 366130), (57152, 363670), (61664, 337060), (62320, 333512), (67412, 308320), (70960, 292904), (71440, 290936), (72734, 285760), (73226, 283840), (77080, 269648), (83378, 249280), (84265, 246656), (99712, 208445), (113536, 183065), (114304, 181835), (123328, 168530), (124640, 166756), (134824, 154160), (141920, 146452), (142880, 145468)]