20949740

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{151}}^1\times {\mathrm{991}}^1$

素因数の和:1158

約数の個数: 48

約数和(自身を含む): 50663424

約数和(自身を除く): 29713684

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 151, 302, 604, 755, 991, 1057, 1510, 1982, 2114, 3020, 3964, 4228, 4955, 5285, 6937, 9910, 10570, 13874, 19820, 21140, 27748, 34685, 69370, 138740, 149641, 299282, 598564, 748205, 1047487, 1496410, 2094974, 2992820, 4189948, 5237435, 10474870, 20949740]

約数ペア:

[(1, 20949740), (2, 10474870), (4, 5237435), (5, 4189948), (7, 2992820), (10, 2094974), (14, 1496410), (20, 1047487), (28, 748205), (35, 598564), (70, 299282), (140, 149641), (151, 138740), (302, 69370), (604, 34685), (755, 27748), (991, 21140), (1057, 19820), (1510, 13874), (1982, 10570), (2114, 9910), (3020, 6937), (3964, 5285), (4228, 4955)]