21120580

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{81233}}^1$

素因数の和:81255

約数の個数: 24

約数和(自身を含む): 47765592

約数和(自身を除く): 26645012

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 81233, 162466, 324932, 406165, 812330, 1056029, 1624660, 2112058, 4224116, 5280145, 10560290, 21120580]

約数ペア:

[(1, 21120580), (2, 10560290), (4, 5280145), (5, 4224116), (10, 2112058), (13, 1624660), (20, 1056029), (26, 812330), (52, 406165), (65, 324932), (130, 162466), (260, 81233)]