20857971

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{67}}^1\times {\mathrm{2531}}^1$

素因数の和:2642

約数の個数: 16

約数和(自身を含む): 28925568

約数和(自身を除く): 8067597

約数列:

[1, 3, 41, 67, 123, 201, 2531, 2747, 7593, 8241, 103771, 169577, 311313, 508731, 6952657, 20857971]

約数ペア:

[(1, 20857971), (3, 6952657), (41, 508731), (67, 311313), (123, 169577), (201, 103771), (2531, 8241), (2747, 7593)]