21138981

素因数分解:

$3^1\times {\mathrm{139}}^1\times {\mathrm{163}}^1\times {\mathrm{311}}^1$

素因数の和:616

約数の個数: 16

約数和(自身を含む): 28654080

約数和(自身を除く): 7515099

約数列:

[1, 3, 139, 163, 311, 417, 489, 933, 22657, 43229, 50693, 67971, 129687, 152079, 7046327, 21138981]

約数ペア:

[(1, 21138981), (3, 7046327), (139, 152079), (163, 129687), (311, 67971), (417, 50693), (489, 43229), (933, 22657)]