18720527

素因数分解:

$7^1\times {\mathrm{89}}^1\times {\mathrm{151}}^1\times {\mathrm{199}}^1$

素因数の和:446

約数の個数: 16

約数和(自身を含む): 21888000

約数和(自身を除く): 3167473

約数列:

[1, 7, 89, 151, 199, 623, 1057, 1393, 13439, 17711, 30049, 94073, 123977, 210343, 2674361, 18720527]

約数ペア:

[(1, 18720527), (7, 2674361), (89, 210343), (151, 123977), (199, 94073), (623, 30049), (1057, 17711), (1393, 13439)]