20951120

素因数分解:

$2^4\times 5^1\times {\mathrm{379}}^1\times {\mathrm{691}}^1$

素因数の和:1083

約数の個数: 40

約数和(自身を含む): 48910560

約数和(自身を除く): 27959440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 379, 691, 758, 1382, 1516, 1895, 2764, 3032, 3455, 3790, 5528, 6064, 6910, 7580, 11056, 13820, 15160, 27640, 30320, 55280, 261889, 523778, 1047556, 1309445, 2095112, 2618890, 4190224, 5237780, 10475560, 20951120]

約数ペア:

[(1, 20951120), (2, 10475560), (4, 5237780), (5, 4190224), (8, 2618890), (10, 2095112), (16, 1309445), (20, 1047556), (40, 523778), (80, 261889), (379, 55280), (691, 30320), (758, 27640), (1382, 15160), (1516, 13820), (1895, 11056), (2764, 7580), (3032, 6910), (3455, 6064), (3790, 5528)]