21287380

素因数分解:

$2^2\times 5^1\times {\mathrm{307}}^1\times {\mathrm{3467}}^1$

素因数の和:3783

約数の個数: 24

約数和(自身を含む): 44862048

約数和(自身を除く): 23574668

約数列:

[1, 2, 4, 5, 10, 20, 307, 614, 1228, 1535, 3070, 3467, 6140, 6934, 13868, 17335, 34670, 69340, 1064369, 2128738, 4257476, 5321845, 10643690, 21287380]

約数ペア:

[(1, 21287380), (2, 10643690), (4, 5321845), (5, 4257476), (10, 2128738), (20, 1064369), (307, 69340), (614, 34670), (1228, 17335), (1535, 13868), (3070, 6934), (3467, 6140)]