21528910

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{12739}}^1$

素因数の和:12772

約数の個数: 24

約数和(自身を含む): 41965560

約数和(自身を除く): 20436650

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 169, 338, 845, 1690, 12739, 25478, 63695, 127390, 165607, 331214, 828035, 1656070, 2152891, 4305782, 10764455, 21528910]

約数ペア:

[(1, 21528910), (2, 10764455), (5, 4305782), (10, 2152891), (13, 1656070), (26, 828035), (65, 331214), (130, 165607), (169, 127390), (338, 63695), (845, 25478), (1690, 12739)]