20478981

素因数分解:

$3^1\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{2381}}^1$

素因数の和:2492

約数の個数: 16

約数和(自身を含む): 28355328

約数和(自身を除く): 7876347

約数列:

[1, 3, 47, 61, 141, 183, 2381, 2867, 7143, 8601, 111907, 145241, 335721, 435723, 6826327, 20478981]

約数ペア:

[(1, 20478981), (3, 6826327), (47, 435723), (61, 335721), (141, 145241), (183, 111907), (2381, 8601), (2867, 7143)]