20157640

素因数分解:

$2^3\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6379}}^1$

素因数の和:6469

約数の個数: 32

約数和(自身を含む): 45936000

約数和(自身を除く): 25778360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 79, 158, 316, 395, 632, 790, 1580, 3160, 6379, 12758, 25516, 31895, 51032, 63790, 127580, 255160, 503941, 1007882, 2015764, 2519705, 4031528, 5039410, 10078820, 20157640]

約数ペア:

[(1, 20157640), (2, 10078820), (4, 5039410), (5, 4031528), (8, 2519705), (10, 2015764), (20, 1007882), (40, 503941), (79, 255160), (158, 127580), (316, 63790), (395, 51032), (632, 31895), (790, 25516), (1580, 12758), (3160, 6379)]