21086585

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{401}}^1\times {\mathrm{809}}^1$

素因数の和:1228

約数の個数: 16

約数和(自身を含む): 27352080

約数和(自身を除く): 6265495

約数列:

[1, 5, 13, 65, 401, 809, 2005, 4045, 5213, 10517, 26065, 52585, 324409, 1622045, 4217317, 21086585]

約数ペア:

[(1, 21086585), (5, 4217317), (13, 1622045), (65, 324409), (401, 52585), (809, 26065), (2005, 10517), (4045, 5213)]