21377380

素因数分解:

$2^2\times 5^1\times {\mathrm{419}}^1\times {\mathrm{2551}}^1$

素因数の和:2979

約数の個数: 24

約数和(自身を含む): 45017280

約数和(自身を除く): 23639900

約数列:

[1, 2, 4, 5, 10, 20, 419, 838, 1676, 2095, 2551, 4190, 5102, 8380, 10204, 12755, 25510, 51020, 1068869, 2137738, 4275476, 5344345, 10688690, 21377380]

約数ペア:

[(1, 21377380), (2, 10688690), (4, 5344345), (5, 4275476), (10, 2137738), (20, 1068869), (419, 51020), (838, 25510), (1676, 12755), (2095, 10204), (2551, 8380), (4190, 5102)]