21172018

素因数分解:

$2^1\times 7^4\times {\mathrm{4409}}^1$

素因数の和:4439

約数の個数: 20

約数和(自身を含む): 37057230

約数和(自身を除く): 15885212

約数列:

[1, 2, 7, 14, 49, 98, 343, 686, 2401, 4409, 4802, 8818, 30863, 61726, 216041, 432082, 1512287, 3024574, 10586009, 21172018]

約数ペア:

[(1, 21172018), (2, 10586009), (7, 3024574), (14, 1512287), (49, 432082), (98, 216041), (343, 61726), (686, 30863), (2401, 8818), (4409, 4802)]