81527680

素因数分解:

$2^7\times 5^1\times {\mathrm{13}}^1\times {\mathrm{41}}^1\times {\mathrm{239}}^1$

素因数の和:312

約数の個数: 128

約数和(自身を含む): 215913600

約数和(自身を除く): 134385920

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 41, 52, 64, 65, 80, 82, 104, 128, 130, 160, 164, 205, 208, 239, 260, 320, 328, 410, 416, 478, 520, 533, 640, 656, 820, 832, 956, 1040, 1066, 1195, 1312, 1640, 1664, 1912, 2080, 2132, 2390, 2624, 2665, 3107, 3280, 3824, 4160, 4264, 4780, 5248, 5330, 6214, 6560, 7648, 8320, 8528, 9560, 9799, 10660, 12428, 13120, 15296, 15535, 17056, 19120, 19598, 21320, 24856, 26240, 30592, 31070, 34112, 38240, 39196, 42640, 48995, 49712, 62140, 68224, 76480, 78392, 85280, 97990, 99424, 124280, 127387, 152960, 156784, 170560, 195980, 198848, 248560, 254774, 313568, 341120, 391960, 397696, 497120, 509548, 627136, 636935, 783920, 994240, 1019096, 1254272, 1273870, 1567840, 1988480, 2038192, 2547740, 3135680, 4076384, 5095480, 6271360, 8152768, 10190960, 16305536, 20381920, 40763840, 81527680]

約数ペア:

[(1, 81527680), (2, 40763840), (4, 20381920), (5, 16305536), (8, 10190960), (10, 8152768), (13, 6271360), (16, 5095480), (20, 4076384), (26, 3135680), (32, 2547740), (40, 2038192), (41, 1988480), (52, 1567840), (64, 1273870), (65, 1254272), (80, 1019096), (82, 994240), (104, 783920), (128, 636935), (130, 627136), (160, 509548), (164, 497120), (205, 397696), (208, 391960), (239, 341120), (260, 313568), (320, 254774), (328, 248560), (410, 198848), (416, 195980), (478, 170560), (520, 156784), (533, 152960), (640, 127387), (656, 124280), (820, 99424), (832, 97990), (956, 85280), (1040, 78392), (1066, 76480), (1195, 68224), (1312, 62140), (1640, 49712), (1664, 48995), (1912, 42640), (2080, 39196), (2132, 38240), (2390, 34112), (2624, 31070), (2665, 30592), (3107, 26240), (3280, 24856), (3824, 21320), (4160, 19598), (4264, 19120), (4780, 17056), (5248, 15535), (5330, 15296), (6214, 13120), (6560, 12428), (7648, 10660), (8320, 9799), (8528, 9560)]