20672920

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{5807}}^1$

素因数の和:5907

約数の個数: 32

約数和(自身を含む): 47044800

約数和(自身を除く): 26371880

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 356, 445, 712, 890, 1780, 3560, 5807, 11614, 23228, 29035, 46456, 58070, 116140, 232280, 516823, 1033646, 2067292, 2584115, 4134584, 5168230, 10336460, 20672920]

約数ペア:

[(1, 20672920), (2, 10336460), (4, 5168230), (5, 4134584), (8, 2584115), (10, 2067292), (20, 1033646), (40, 516823), (89, 232280), (178, 116140), (356, 58070), (445, 46456), (712, 29035), (890, 23228), (1780, 11614), (3560, 5807)]