20490910

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{1709}}^1$

素因数の和:1836

約数の個数: 32

約数和(自身を含む): 40629600

約数和(自身を除く): 20138690

約数列:

[1, 2, 5, 10, 11, 22, 55, 109, 110, 218, 545, 1090, 1199, 1709, 2398, 3418, 5995, 8545, 11990, 17090, 18799, 37598, 93995, 186281, 187990, 372562, 931405, 1862810, 2049091, 4098182, 10245455, 20490910]

約数ペア:

[(1, 20490910), (2, 10245455), (5, 4098182), (10, 2049091), (11, 1862810), (22, 931405), (55, 372562), (109, 187990), (110, 186281), (218, 93995), (545, 37598), (1090, 18799), (1199, 17090), (1709, 11990), (2398, 8545), (3418, 5995)]