21051653

素因数分解:

$7^1\times {\mathrm{53}}^1\times {\mathrm{179}}^1\times {\mathrm{317}}^1$

素因数の和:556

約数の個数: 16

約数和(自身を含む): 24727680

約数和(自身を除く): 3676027

約数列:

[1, 7, 53, 179, 317, 371, 1253, 2219, 9487, 16801, 56743, 66409, 117607, 397201, 3007379, 21051653]

約数ペア:

[(1, 21051653), (7, 3007379), (53, 397201), (179, 117607), (317, 66409), (371, 56743), (1253, 16801), (2219, 9487)]