20505730

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{197}}^1\times {\mathrm{1487}}^1$

素因数の和:1698

約数の個数: 32

約数和(自身を含む): 42425856

約数和(自身を除く): 21920126

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 197, 394, 985, 1379, 1487, 1970, 2758, 2974, 6895, 7435, 10409, 13790, 14870, 20818, 52045, 104090, 292939, 585878, 1464695, 2050573, 2929390, 4101146, 10252865, 20505730]

約数ペア:

[(1, 20505730), (2, 10252865), (5, 4101146), (7, 2929390), (10, 2050573), (14, 1464695), (35, 585878), (70, 292939), (197, 104090), (394, 52045), (985, 20818), (1379, 14870), (1487, 13790), (1970, 10409), (2758, 7435), (2974, 6895)]