20118520

素因数分解:

$2^3\times 5^1\times {\mathrm{113}}^1\times {\mathrm{4451}}^1$

素因数の和:4575

約数の個数: 32

約数和(自身を含む): 45677520

約数和(自身を除く): 25559000

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 113, 226, 452, 565, 904, 1130, 2260, 4451, 4520, 8902, 17804, 22255, 35608, 44510, 89020, 178040, 502963, 1005926, 2011852, 2514815, 4023704, 5029630, 10059260, 20118520]

約数ペア:

[(1, 20118520), (2, 10059260), (4, 5029630), (5, 4023704), (8, 2514815), (10, 2011852), (20, 1005926), (40, 502963), (113, 178040), (226, 89020), (452, 44510), (565, 35608), (904, 22255), (1130, 17804), (2260, 8902), (4451, 4520)]