21197979

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{277}}^1\times {\mathrm{773}}^1$

素因数の和:1067

約数の個数: 24

約数和(自身を含む): 33566832

約数和(自身を除く): 12368853

約数列:

[1, 3, 9, 11, 33, 99, 277, 773, 831, 2319, 2493, 3047, 6957, 8503, 9141, 25509, 27423, 76527, 214121, 642363, 1927089, 2355331, 7065993, 21197979]

約数ペア:

[(1, 21197979), (3, 7065993), (9, 2355331), (11, 1927089), (33, 642363), (99, 214121), (277, 76527), (773, 27423), (831, 25509), (2319, 9141), (2493, 8503), (3047, 6957)]