21765879

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{163}}^1\times {\mathrm{401}}^1$

素因数の和:607

約数の個数: 24

約数和(自身を含む): 32568432

約数和(自身を除く): 10802553

約数列:

[1, 3, 9, 37, 111, 163, 333, 401, 489, 1203, 1467, 3609, 6031, 14837, 18093, 44511, 54279, 65363, 133533, 196089, 588267, 2418431, 7255293, 21765879]

約数ペア:

[(1, 21765879), (3, 7255293), (9, 2418431), (37, 588267), (111, 196089), (163, 133533), (333, 65363), (401, 54279), (489, 44511), (1203, 18093), (1467, 14837), (3609, 6031)]