21578980

素因数分解:

$2^2\times 5^1\times {\mathrm{523}}^1\times {\mathrm{2063}}^1$

素因数の和:2595

約数の個数: 24

約数和(自身を含む): 45424512

約数和(自身を除く): 23845532

約数列:

[1, 2, 4, 5, 10, 20, 523, 1046, 2063, 2092, 2615, 4126, 5230, 8252, 10315, 10460, 20630, 41260, 1078949, 2157898, 4315796, 5394745, 10789490, 21578980]

約数ペア:

[(1, 21578980), (2, 10789490), (4, 5394745), (5, 4315796), (10, 2157898), (20, 1078949), (523, 41260), (1046, 20630), (2063, 10460), (2092, 10315), (2615, 8252), (4126, 5230)]