19979650

素因数分解:

$2^1\times 5^2\times {\mathrm{409}}^1\times {\mathrm{977}}^1$

素因数の和:1398

約数の個数: 24

約数和(自身を含む): 37291140

約数和(自身を除く): 17311490

約数列:

[1, 2, 5, 10, 25, 50, 409, 818, 977, 1954, 2045, 4090, 4885, 9770, 10225, 20450, 24425, 48850, 399593, 799186, 1997965, 3995930, 9989825, 19979650]

約数ペア:

[(1, 19979650), (2, 9989825), (5, 3995930), (10, 1997965), (25, 799186), (50, 399593), (409, 48850), (818, 24425), (977, 20450), (1954, 10225), (2045, 9770), (4090, 4885)]