21420295

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{2099}}^1$

素因数の和:2274

約数の個数: 16

約数和(自身を含む): 27871200

約数和(自身を除く): 6450905

約数列:

[1, 5, 13, 65, 157, 785, 2041, 2099, 10205, 10495, 27287, 136435, 329543, 1647715, 4284059, 21420295]

約数ペア:

[(1, 21420295), (5, 4284059), (13, 1647715), (65, 329543), (157, 136435), (785, 27287), (2041, 10495), (2099, 10205)]