19974578

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{139}}^1\times {\mathrm{5527}}^1$

素因数の和:5681

約数の個数: 16

約数和(自身を含む): 32504640

約数和(自身を除く): 12530062

約数列:

[1, 2, 13, 26, 139, 278, 1807, 3614, 5527, 11054, 71851, 143702, 768253, 1536506, 9987289, 19974578]

約数ペア:

[(1, 19974578), (2, 9987289), (13, 1536506), (26, 768253), (139, 143702), (278, 71851), (1807, 11054), (3614, 5527)]