20715175

素因数分解:

$5^2\times {\mathrm{13}}^2\times {\mathrm{4903}}^1$

素因数の和:4939

約数の個数: 18

約数和(自身を含む): 27820392

約数和(自身を除く): 7105217

約数列:

[1, 5, 13, 25, 65, 169, 325, 845, 4225, 4903, 24515, 63739, 122575, 318695, 828607, 1593475, 4143035, 20715175]

約数ペア:

[(1, 20715175), (5, 4143035), (13, 1593475), (25, 828607), (65, 318695), (169, 122575), (325, 63739), (845, 24515), (4225, 4903)]