39749020

素因数分解:

$2^2\times 5^1\times {\mathrm{1987451}}^1$

素因数の和:1987460

約数の個数: 12

約数和(自身を含む): 83472984

約数和(自身を除く): 43723964

約数列:

[1, 2, 4, 5, 10, 20, 1987451, 3974902, 7949804, 9937255, 19874510, 39749020]

約数ペア:

[(1, 39749020), (2, 19874510), (4, 9937255), (5, 7949804), (10, 3974902), (20, 1987451)]