21181785

素因数分解:

$3^1\times 5^1\times {\mathrm{71}}^1\times {\mathrm{19889}}^1$

素因数の和:19968

約数の個数: 16

約数和(自身を含む): 34369920

約数和(自身を除く): 13188135

約数列:

[1, 3, 5, 15, 71, 213, 355, 1065, 19889, 59667, 99445, 298335, 1412119, 4236357, 7060595, 21181785]

約数ペア:

[(1, 21181785), (3, 7060595), (5, 4236357), (15, 1412119), (71, 298335), (213, 99445), (355, 59667), (1065, 19889)]