428980

素因数分解:

$2^2\times 5^1\times {\mathrm{89}}^1\times {\mathrm{241}}^1$

素因数の和:339

約数の個数: 24

約数和(自身を含む): 914760

約数和(自身を除く): 485780

約数列:

[1, 2, 4, 5, 10, 20, 89, 178, 241, 356, 445, 482, 890, 964, 1205, 1780, 2410, 4820, 21449, 42898, 85796, 107245, 214490, 428980]

約数ペア:

[(1, 428980), (2, 214490), (4, 107245), (5, 85796), (10, 42898), (20, 21449), (89, 4820), (178, 2410), (241, 1780), (356, 1205), (445, 964), (482, 890)]