21053979

素因数分解:

$3^3\times {\mathrm{47}}^2\times {\mathrm{353}}^1$

素因数の和:456

約数の個数: 24

約数和(自身を含む): 31959120

約数和(自身を除く): 10905141

約数列:

[1, 3, 9, 27, 47, 141, 353, 423, 1059, 1269, 2209, 3177, 6627, 9531, 16591, 19881, 49773, 59643, 149319, 447957, 779777, 2339331, 7017993, 21053979]

約数ペア:

[(1, 21053979), (3, 7017993), (9, 2339331), (27, 779777), (47, 447957), (141, 149319), (353, 59643), (423, 49773), (1059, 19881), (1269, 16591), (2209, 9531), (3177, 6627)]