21240640

素因数分解:

$2^6\times 5^1\times {\mathrm{66377}}^1$

素因数の和:66394

約数の個数: 28

約数和(自身を含む): 50580036

約数和(自身を除く): 29339396

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 320, 66377, 132754, 265508, 331885, 531016, 663770, 1062032, 1327540, 2124064, 2655080, 4248128, 5310160, 10620320, 21240640]

約数ペア:

[(1, 21240640), (2, 10620320), (4, 5310160), (5, 4248128), (8, 2655080), (10, 2124064), (16, 1327540), (20, 1062032), (32, 663770), (40, 531016), (64, 331885), (80, 265508), (160, 132754), (320, 66377)]