21406913

素因数分解:

${\mathrm{11}}^1\times {\mathrm{61}}^2\times {\mathrm{523}}^1$

素因数の和:656

約数の個数: 12

約数和(自身を含む): 23787504

約数和(自身を除く): 2380591

約数列:

[1, 11, 61, 523, 671, 3721, 5753, 31903, 40931, 350933, 1946083, 21406913]

約数ペア:

[(1, 21406913), (11, 1946083), (61, 350933), (523, 40931), (671, 31903), (3721, 5753)]