19774521

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{13001}}^1$

素因数の和:13033

約数の個数: 18

約数和(自身を含む): 30931758

約数和(自身を除く): 11157237

約数列:

[1, 3, 9, 13, 39, 117, 169, 507, 1521, 13001, 39003, 117009, 169013, 507039, 1521117, 2197169, 6591507, 19774521]

約数ペア:

[(1, 19774521), (3, 6591507), (9, 2197169), (13, 1521117), (39, 507039), (117, 169013), (169, 117009), (507, 39003), (1521, 13001)]