21805651

素因数分解:

$7^1\times {\mathrm{29}}^1\times {\mathrm{163}}^1\times {\mathrm{659}}^1$

素因数の和:858

約数の個数: 16

約数和(自身を含む): 25977600

約数和(自身を除く): 4171949

約数列:

[1, 7, 29, 163, 203, 659, 1141, 4613, 4727, 19111, 33089, 107417, 133777, 751919, 3115093, 21805651]

約数ペア:

[(1, 21805651), (7, 3115093), (29, 751919), (163, 133777), (203, 107417), (659, 33089), (1141, 19111), (4613, 4727)]