21757640

素因数分解:

$2^3\times 5^1\times {\mathrm{127}}^1\times {\mathrm{4283}}^1$

素因数の和:4421

約数の個数: 32

約数和(自身を含む): 49351680

約数和(自身を除く): 27594040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 127, 254, 508, 635, 1016, 1270, 2540, 4283, 5080, 8566, 17132, 21415, 34264, 42830, 85660, 171320, 543941, 1087882, 2175764, 2719705, 4351528, 5439410, 10878820, 21757640]

約数ペア:

[(1, 21757640), (2, 10878820), (4, 5439410), (5, 4351528), (8, 2719705), (10, 2175764), (20, 1087882), (40, 543941), (127, 171320), (254, 85660), (508, 42830), (635, 34264), (1016, 21415), (1270, 17132), (2540, 8566), (4283, 5080)]