21268420

素因数分解:

$2^2\times 5^1\times {\mathrm{739}}^1\times {\mathrm{1439}}^1$

素因数の和:2187

約数の個数: 24

約数和(自身を含む): 44755200

約数和(自身を除く): 23486780

約数列:

[1, 2, 4, 5, 10, 20, 739, 1439, 1478, 2878, 2956, 3695, 5756, 7195, 7390, 14390, 14780, 28780, 1063421, 2126842, 4253684, 5317105, 10634210, 21268420]

約数ペア:

[(1, 21268420), (2, 10634210), (4, 5317105), (5, 4253684), (10, 2126842), (20, 1063421), (739, 28780), (1439, 14780), (1478, 14390), (2878, 7390), (2956, 7195), (3695, 5756)]