21513560

素因数分解:

$2^3\times 5^1\times {\mathrm{211}}^1\times {\mathrm{2549}}^1$

素因数の和:2771

約数の個数: 32

約数和(自身を含む): 48654000

約数和(自身を除く): 27140440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 211, 422, 844, 1055, 1688, 2110, 2549, 4220, 5098, 8440, 10196, 12745, 20392, 25490, 50980, 101960, 537839, 1075678, 2151356, 2689195, 4302712, 5378390, 10756780, 21513560]

約数ペア:

[(1, 21513560), (2, 10756780), (4, 5378390), (5, 4302712), (8, 2689195), (10, 2151356), (20, 1075678), (40, 537839), (211, 101960), (422, 50980), (844, 25490), (1055, 20392), (1688, 12745), (2110, 10196), (2549, 8440), (4220, 5098)]