20985820

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{61723}}^1$

素因数の和:61749

約数の個数: 24

約数和(自身を含む): 46663344

約数和(自身を除く): 25677524

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 61723, 123446, 246892, 308615, 617230, 1049291, 1234460, 2098582, 4197164, 5246455, 10492910, 20985820]

約数ペア:

[(1, 20985820), (2, 10492910), (4, 5246455), (5, 4197164), (10, 2098582), (17, 1234460), (20, 1049291), (34, 617230), (68, 308615), (85, 246892), (170, 123446), (340, 61723)]