639653

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{137}}^1$

素因数の和:196

約数の個数: 16

約数和(自身を含む): 794880

約数和(自身を除く): 155227

約数列:

[1, 7, 23, 29, 137, 161, 203, 667, 959, 3151, 3973, 4669, 22057, 27811, 91379, 639653]

約数ペア:

[(1, 639653), (7, 91379), (23, 27811), (29, 22057), (137, 4669), (161, 3973), (203, 3151), (667, 959)]