21243255

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128747}}^1$

素因数の和:128766

約数の個数: 16

約数和(自身を含む): 37079424

約数和(自身を除く): 15836169

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128747, 386241, 643735, 1416217, 1931205, 4248651, 7081085, 21243255]

約数ペア:

[(1, 21243255), (3, 7081085), (5, 4248651), (11, 1931205), (15, 1416217), (33, 643735), (55, 386241), (165, 128747)]