64038980

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{40531}}^1$

素因数の和:40619

約数の個数: 24

約数和(自身を含む): 136187520

約数和(自身を除く): 72148540

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 40531, 81062, 162124, 202655, 405310, 810620, 3201949, 6403898, 12807796, 16009745, 32019490, 64038980]

約数ペア:

[(1, 64038980), (2, 32019490), (4, 16009745), (5, 12807796), (10, 6403898), (20, 3201949), (79, 810620), (158, 405310), (316, 202655), (395, 162124), (790, 81062), (1580, 40531)]