21200985

素因数分解:

$3^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{36241}}^1$

素因数の和:36265

約数の個数: 24

約数和(自身を含む): 39576264

約数和(自身を除く): 18375279

約数列:

[1, 3, 5, 9, 13, 15, 39, 45, 65, 117, 195, 585, 36241, 108723, 181205, 326169, 471133, 543615, 1413399, 1630845, 2355665, 4240197, 7066995, 21200985]

約数ペア:

[(1, 21200985), (3, 7066995), (5, 4240197), (9, 2355665), (13, 1630845), (15, 1413399), (39, 543615), (45, 471133), (65, 326169), (117, 181205), (195, 108723), (585, 36241)]