20164781

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{3121}}^1$

素因数の和:3212

約数の個数: 16

約数和(自身を含む): 25175808

約数和(自身を除く): 5011027

約数列:

[1, 7, 13, 71, 91, 497, 923, 3121, 6461, 21847, 40573, 221591, 284011, 1551137, 2880683, 20164781]

約数ペア:

[(1, 20164781), (7, 2880683), (13, 1551137), (71, 284011), (91, 221591), (497, 40573), (923, 21847), (3121, 6461)]