20139160

素因数分解:

$2^3\times 5^1\times {\mathrm{409}}^1\times {\mathrm{1231}}^1$

素因数の和:1651

約数の個数: 32

約数和(自身を含む): 45460800

約数和(自身を除く): 25321640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 409, 818, 1231, 1636, 2045, 2462, 3272, 4090, 4924, 6155, 8180, 9848, 12310, 16360, 24620, 49240, 503479, 1006958, 2013916, 2517395, 4027832, 5034790, 10069580, 20139160]

約数ペア:

[(1, 20139160), (2, 10069580), (4, 5034790), (5, 4027832), (8, 2517395), (10, 2013916), (20, 1006958), (40, 503479), (409, 49240), (818, 24620), (1231, 16360), (1636, 12310), (2045, 9848), (2462, 8180), (3272, 6155), (4090, 4924)]