20697840

素因数分解:

$2^4\times 3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{89}}^1$

素因数の和:144

約数の個数: 240

約数和(自身を含む): 78343200

約数和(自身を除く): 57645360

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 17, 18, 19, 20, 24, 30, 34, 36, 38, 40, 45, 48, 51, 57, 60, 68, 72, 76, 80, 85, 89, 90, 95, 102, 114, 120, 136, 144, 152, 153, 170, 171, 178, 180, 190, 204, 228, 240, 255, 267, 272, 285, 304, 306, 323, 340, 342, 356, 360, 380, 408, 445, 456, 510, 534, 570, 612, 646, 680, 684, 712, 720, 760, 765, 801, 816, 855, 890, 912, 969, 1020, 1068, 1140, 1224, 1292, 1335, 1360, 1368, 1424, 1513, 1520, 1530, 1602, 1615, 1691, 1710, 1780, 1938, 2040, 2136, 2280, 2448, 2584, 2670, 2736, 2907, 3026, 3060, 3204, 3230, 3382, 3420, 3560, 3876, 4005, 4080, 4272, 4539, 4560, 4845, 5073, 5168, 5340, 5814, 6052, 6120, 6408, 6460, 6764, 6840, 7120, 7565, 7752, 8010, 8455, 9078, 9690, 10146, 10680, 11628, 12104, 12240, 12816, 12920, 13528, 13617, 13680, 14535, 15130, 15219, 15504, 16020, 16910, 18156, 19380, 20292, 21360, 22695, 23256, 24208, 25365, 25840, 27056, 27234, 28747, 29070, 30260, 30438, 32040, 33820, 36312, 38760, 40584, 45390, 46512, 50730, 54468, 57494, 58140, 60520, 60876, 64080, 67640, 68085, 72624, 76095, 77520, 81168, 86241, 90780, 101460, 108936, 114988, 116280, 121040, 121752, 135280, 136170, 143735, 152190, 172482, 181560, 202920, 217872, 229976, 232560, 243504, 258723, 272340, 287470, 304380, 344964, 363120, 405840, 431205, 459952, 517446, 544680, 574940, 608760, 689928, 862410, 1034892, 1089360, 1149880, 1217520, 1293615, 1379856, 1724820, 2069784, 2299760, 2587230, 3449640, 4139568, 5174460, 6899280, 10348920, 20697840]

約数ペア:

[(1, 20697840), (2, 10348920), (3, 6899280), (4, 5174460), (5, 4139568), (6, 3449640), (8, 2587230), (9, 2299760), (10, 2069784), (12, 1724820), (15, 1379856), (16, 1293615), (17, 1217520), (18, 1149880), (19, 1089360), (20, 1034892), (24, 862410), (30, 689928), (34, 608760), (36, 574940), (38, 544680), (40, 517446), (45, 459952), (48, 431205), (51, 405840), (57, 363120), (60, 344964), (68, 304380), (72, 287470), (76, 272340), (80, 258723), (85, 243504), (89, 232560), (90, 229976), (95, 217872), (102, 202920), (114, 181560), (120, 172482), (136, 152190), (144, 143735), (152, 136170), (153, 135280), (170, 121752), (171, 121040), (178, 116280), (180, 114988), (190, 108936), (204, 101460), (228, 90780), (240, 86241), (255, 81168), (267, 77520), (272, 76095), (285, 72624), (304, 68085), (306, 67640), (323, 64080), (340, 60876), (342, 60520), (356, 58140), (360, 57494), (380, 54468), (408, 50730), (445, 46512), (456, 45390), (510, 40584), (534, 38760), (570, 36312), (612, 33820), (646, 32040), (680, 30438), (684, 30260), (712, 29070), (720, 28747), (760, 27234), (765, 27056), (801, 25840), (816, 25365), (855, 24208), (890, 23256), (912, 22695), (969, 21360), (1020, 20292), (1068, 19380), (1140, 18156), (1224, 16910), (1292, 16020), (1335, 15504), (1360, 15219), (1368, 15130), (1424, 14535), (1513, 13680), (1520, 13617), (1530, 13528), (1602, 12920), (1615, 12816), (1691, 12240), (1710, 12104), (1780, 11628), (1938, 10680), (2040, 10146), (2136, 9690), (2280, 9078), (2448, 8455), (2584, 8010), (2670, 7752), (2736, 7565), (2907, 7120), (3026, 6840), (3060, 6764), (3204, 6460), (3230, 6408), (3382, 6120), (3420, 6052), (3560, 5814), (3876, 5340), (4005, 5168), (4080, 5073), (4272, 4845), (4539, 4560)]