15720561

素因数分解:

$3^4\times {\mathrm{421}}^1\times {\mathrm{461}}^1$

素因数の和:894

約数の個数: 20

約数和(自身を含む): 23590644

約数和(自身を除く): 7870083

約数列:

[1, 3, 9, 27, 81, 421, 461, 1263, 1383, 3789, 4149, 11367, 12447, 34101, 37341, 194081, 582243, 1746729, 5240187, 15720561]

約数ペア:

[(1, 15720561), (3, 5240187), (9, 1746729), (27, 582243), (81, 194081), (421, 37341), (461, 34101), (1263, 12447), (1383, 11367), (3789, 4149)]