20492640

素因数分解:

$2^5\times 3^2\times 5^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1$

素因数の和:154

約数の個数: 288

約数和(自身を含む): 84913920

約数和(自身を除く): 64421280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 19, 20, 21, 24, 28, 30, 32, 35, 36, 38, 40, 42, 45, 48, 56, 57, 60, 63, 70, 72, 76, 80, 84, 90, 95, 96, 105, 107, 112, 114, 120, 126, 133, 140, 144, 152, 160, 168, 171, 180, 190, 210, 214, 224, 228, 240, 252, 266, 280, 285, 288, 304, 315, 321, 336, 342, 360, 380, 399, 420, 428, 456, 480, 504, 532, 535, 560, 570, 608, 630, 642, 665, 672, 684, 720, 749, 760, 798, 840, 855, 856, 912, 963, 1008, 1064, 1070, 1120, 1140, 1197, 1260, 1284, 1330, 1368, 1440, 1498, 1520, 1596, 1605, 1680, 1710, 1712, 1824, 1926, 1995, 2016, 2033, 2128, 2140, 2247, 2280, 2394, 2520, 2568, 2660, 2736, 2996, 3040, 3192, 3210, 3360, 3420, 3424, 3745, 3852, 3990, 4066, 4256, 4280, 4494, 4560, 4788, 4815, 5040, 5136, 5320, 5472, 5985, 5992, 6099, 6384, 6420, 6741, 6840, 7490, 7704, 7980, 8132, 8560, 8988, 9120, 9576, 9630, 10080, 10165, 10272, 10640, 11235, 11970, 11984, 12198, 12768, 12840, 13482, 13680, 14231, 14980, 15408, 15960, 16264, 17120, 17976, 18297, 19152, 19260, 20330, 21280, 22470, 23940, 23968, 24396, 25680, 26964, 27360, 28462, 29960, 30495, 30816, 31920, 32528, 33705, 35952, 36594, 38304, 38520, 40660, 42693, 44940, 47880, 48792, 51360, 53928, 56924, 59920, 60990, 63840, 65056, 67410, 71155, 71904, 73188, 77040, 81320, 85386, 89880, 91485, 95760, 97584, 107856, 113848, 119840, 121980, 128079, 134820, 142310, 146376, 154080, 162640, 170772, 179760, 182970, 191520, 195168, 213465, 215712, 227696, 243960, 256158, 269640, 284620, 292752, 325280, 341544, 359520, 365940, 426930, 455392, 487920, 512316, 539280, 569240, 585504, 640395, 683088, 731880, 853860, 975840, 1024632, 1078560, 1138480, 1280790, 1366176, 1463760, 1707720, 2049264, 2276960, 2561580, 2927520, 3415440, 4098528, 5123160, 6830880, 10246320, 20492640]

約数ペア:

[(1, 20492640), (2, 10246320), (3, 6830880), (4, 5123160), (5, 4098528), (6, 3415440), (7, 2927520), (8, 2561580), (9, 2276960), (10, 2049264), (12, 1707720), (14, 1463760), (15, 1366176), (16, 1280790), (18, 1138480), (19, 1078560), (20, 1024632), (21, 975840), (24, 853860), (28, 731880), (30, 683088), (32, 640395), (35, 585504), (36, 569240), (38, 539280), (40, 512316), (42, 487920), (45, 455392), (48, 426930), (56, 365940), (57, 359520), (60, 341544), (63, 325280), (70, 292752), (72, 284620), (76, 269640), (80, 256158), (84, 243960), (90, 227696), (95, 215712), (96, 213465), (105, 195168), (107, 191520), (112, 182970), (114, 179760), (120, 170772), (126, 162640), (133, 154080), (140, 146376), (144, 142310), (152, 134820), (160, 128079), (168, 121980), (171, 119840), (180, 113848), (190, 107856), (210, 97584), (214, 95760), (224, 91485), (228, 89880), (240, 85386), (252, 81320), (266, 77040), (280, 73188), (285, 71904), (288, 71155), (304, 67410), (315, 65056), (321, 63840), (336, 60990), (342, 59920), (360, 56924), (380, 53928), (399, 51360), (420, 48792), (428, 47880), (456, 44940), (480, 42693), (504, 40660), (532, 38520), (535, 38304), (560, 36594), (570, 35952), (608, 33705), (630, 32528), (642, 31920), (665, 30816), (672, 30495), (684, 29960), (720, 28462), (749, 27360), (760, 26964), (798, 25680), (840, 24396), (855, 23968), (856, 23940), (912, 22470), (963, 21280), (1008, 20330), (1064, 19260), (1070, 19152), (1120, 18297), (1140, 17976), (1197, 17120), (1260, 16264), (1284, 15960), (1330, 15408), (1368, 14980), (1440, 14231), (1498, 13680), (1520, 13482), (1596, 12840), (1605, 12768), (1680, 12198), (1710, 11984), (1712, 11970), (1824, 11235), (1926, 10640), (1995, 10272), (2016, 10165), (2033, 10080), (2128, 9630), (2140, 9576), (2247, 9120), (2280, 8988), (2394, 8560), (2520, 8132), (2568, 7980), (2660, 7704), (2736, 7490), (2996, 6840), (3040, 6741), (3192, 6420), (3210, 6384), (3360, 6099), (3420, 5992), (3424, 5985), (3745, 5472), (3852, 5320), (3990, 5136), (4066, 5040), (4256, 4815), (4280, 4788), (4494, 4560)]