78801640

素因数分解:

$2^3\times 5^1\times {\mathrm{691}}^1\times {\mathrm{2851}}^1$

素因数の和:3553

約数の個数: 32

約数和(自身を含む): 177622560

約数和(自身を除く): 98820920

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 691, 1382, 2764, 2851, 3455, 5528, 5702, 6910, 11404, 13820, 14255, 22808, 27640, 28510, 57020, 114040, 1970041, 3940082, 7880164, 9850205, 15760328, 19700410, 39400820, 78801640]

約数ペア:

[(1, 78801640), (2, 39400820), (4, 19700410), (5, 15760328), (8, 9850205), (10, 7880164), (20, 3940082), (40, 1970041), (691, 114040), (1382, 57020), (2764, 28510), (2851, 27640), (3455, 22808), (5528, 14255), (5702, 13820), (6910, 11404)]