20381920

素因数分解:

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

素因数の和:308

約数の個数: 96

約数和(自身を含む): 53343360

約数和(自身を除く): 32961440

約数列:

[1, 2, 4, 5, 8, 10, 13, 16, 20, 26, 32, 40, 41, 52, 65, 80, 82, 104, 130, 160, 164, 205, 208, 239, 260, 328, 410, 416, 478, 520, 533, 656, 820, 956, 1040, 1066, 1195, 1312, 1640, 1912, 2080, 2132, 2390, 2665, 3107, 3280, 3824, 4264, 4780, 5330, 6214, 6560, 7648, 8528, 9560, 9799, 10660, 12428, 15535, 17056, 19120, 19598, 21320, 24856, 31070, 38240, 39196, 42640, 48995, 49712, 62140, 78392, 85280, 97990, 99424, 124280, 127387, 156784, 195980, 248560, 254774, 313568, 391960, 497120, 509548, 636935, 783920, 1019096, 1273870, 1567840, 2038192, 2547740, 4076384, 5095480, 10190960, 20381920]

約数ペア:

[(1, 20381920), (2, 10190960), (4, 5095480), (5, 4076384), (8, 2547740), (10, 2038192), (13, 1567840), (16, 1273870), (20, 1019096), (26, 783920), (32, 636935), (40, 509548), (41, 497120), (52, 391960), (65, 313568), (80, 254774), (82, 248560), (104, 195980), (130, 156784), (160, 127387), (164, 124280), (205, 99424), (208, 97990), (239, 85280), (260, 78392), (328, 62140), (410, 49712), (416, 48995), (478, 42640), (520, 39196), (533, 38240), (656, 31070), (820, 24856), (956, 21320), (1040, 19598), (1066, 19120), (1195, 17056), (1312, 15535), (1640, 12428), (1912, 10660), (2080, 9799), (2132, 9560), (2390, 8528), (2665, 7648), (3107, 6560), (3280, 6214), (3824, 5330), (4264, 4780)]