21056980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{150407}}^1$

素因数の和:150423

約数の個数: 24

約数和(自身を含む): 50537088

約数和(自身を除く): 29480108

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 150407, 300814, 601628, 752035, 1052849, 1504070, 2105698, 3008140, 4211396, 5264245, 10528490, 21056980]

約数ペア:

[(1, 21056980), (2, 10528490), (4, 5264245), (5, 4211396), (7, 3008140), (10, 2105698), (14, 1504070), (20, 1052849), (28, 752035), (35, 601628), (70, 300814), (140, 150407)]