21647691

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{53}}^1\times {\mathrm{3491}}^1$

素因数の和:3563

約数の個数: 24

約数和(自身を含む): 34319376

約数和(自身を除く): 12671685

約数列:

[1, 3, 9, 13, 39, 53, 117, 159, 477, 689, 2067, 3491, 6201, 10473, 31419, 45383, 136149, 185023, 408447, 555069, 1665207, 2405299, 7215897, 21647691]

約数ペア:

[(1, 21647691), (3, 7215897), (9, 2405299), (13, 1665207), (39, 555069), (53, 408447), (117, 185023), (159, 136149), (477, 45383), (689, 31419), (2067, 10473), (3491, 6201)]