21808171

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{61}}^1\times {\mathrm{4643}}^1$

素因数の和:4722

約数の個数: 16

約数和(自身を含む): 27641088

約数和(自身を除く): 5832917

約数列:

[1, 7, 11, 61, 77, 427, 671, 4643, 4697, 32501, 51073, 283223, 357511, 1982561, 3115453, 21808171]

約数ペア:

[(1, 21808171), (7, 3115453), (11, 1982561), (61, 357511), (77, 283223), (427, 51073), (671, 32501), (4643, 4697)]