31171820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{109}}^1\times {\mathrm{181}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 67267200

約数和(自身を除く): 36095380

約数列:

[1, 2, 4, 5, 10, 20, 79, 109, 158, 181, 218, 316, 362, 395, 436, 545, 724, 790, 905, 1090, 1580, 1810, 2180, 3620, 8611, 14299, 17222, 19729, 28598, 34444, 39458, 43055, 57196, 71495, 78916, 86110, 98645, 142990, 172220, 197290, 285980, 394580, 1558591, 3117182, 6234364, 7792955, 15585910, 31171820]

約数ペア:

[(1, 31171820), (2, 15585910), (4, 7792955), (5, 6234364), (10, 3117182), (20, 1558591), (79, 394580), (109, 285980), (158, 197290), (181, 172220), (218, 142990), (316, 98645), (362, 86110), (395, 78916), (436, 71495), (545, 57196), (724, 43055), (790, 39458), (905, 34444), (1090, 28598), (1580, 19729), (1810, 17222), (2180, 14299), (3620, 8611)]