19961360

素因数分解:

$2^4\times 5^1\times {\mathrm{249517}}^1$

素因数の和:249530

約数の個数: 20

約数和(自身を含む): 46410348

約数和(自身を除く): 26448988

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 249517, 499034, 998068, 1247585, 1996136, 2495170, 3992272, 4990340, 9980680, 19961360]

約数ペア:

[(1, 19961360), (2, 9980680), (4, 4990340), (5, 3992272), (8, 2495170), (10, 1996136), (16, 1247585), (20, 998068), (40, 499034), (80, 249517)]