90820720

素因数分解:

$2^4\times 5^1\times {\mathrm{521}}^1\times {\mathrm{2179}}^1$

素因数の和:2713

約数の個数: 40

約数和(自身を含む): 211660560

約数和(自身を除く): 120839840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 521, 1042, 2084, 2179, 2605, 4168, 4358, 5210, 8336, 8716, 10420, 10895, 17432, 20840, 21790, 34864, 41680, 43580, 87160, 174320, 1135259, 2270518, 4541036, 5676295, 9082072, 11352590, 18164144, 22705180, 45410360, 90820720]

約数ペア:

[(1, 90820720), (2, 45410360), (4, 22705180), (5, 18164144), (8, 11352590), (10, 9082072), (16, 5676295), (20, 4541036), (40, 2270518), (80, 1135259), (521, 174320), (1042, 87160), (2084, 43580), (2179, 41680), (2605, 34864), (4168, 21790), (4358, 20840), (5210, 17432), (8336, 10895), (8716, 10420)]