20749967

素因数分解:

$7^1\times {\mathrm{67}}^1\times {\mathrm{151}}^1\times {\mathrm{293}}^1$

素因数の和:518

約数の個数: 16

約数和(自身を含む): 24310272

約数和(自身を除く): 3560305

約数列:

[1, 7, 67, 151, 293, 469, 1057, 2051, 10117, 19631, 44243, 70819, 137417, 309701, 2964281, 20749967]

約数ペア:

[(1, 20749967), (7, 2964281), (67, 309701), (151, 137417), (293, 70819), (469, 44243), (1057, 19631), (2051, 10117)]