20778868640

素因数分解:

$2^5\times 5^1\times {\mathrm{2621}}^1\times {\mathrm{49549}}^1$

素因数の和:52185

約数の個数: 48

約数和(自身を含む): 49109797800

約数和(自身を除く): 28330929160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 2621, 5242, 10484, 13105, 20968, 26210, 41936, 49549, 52420, 83872, 99098, 104840, 198196, 209680, 247745, 396392, 419360, 495490, 792784, 990980, 1585568, 1981960, 3963920, 7927840, 129867929, 259735858, 519471716, 649339645, 1038943432, 1298679290, 2077886864, 2597358580, 4155773728, 5194717160, 10389434320, 20778868640]

約数ペア:

[(1, 20778868640), (2, 10389434320), (4, 5194717160), (5, 4155773728), (8, 2597358580), (10, 2077886864), (16, 1298679290), (20, 1038943432), (32, 649339645), (40, 519471716), (80, 259735858), (160, 129867929), (2621, 7927840), (5242, 3963920), (10484, 1981960), (13105, 1585568), (20968, 990980), (26210, 792784), (41936, 495490), (49549, 419360), (52420, 396392), (83872, 247745), (99098, 209680), (104840, 198196)]