21505730

素因数分解:

$2^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{52453}}^1$

素因数の和:52501

約数の個数: 16

約数和(自身を含む): 39655224

約数和(自身を除く): 18149494

約数列:

[1, 2, 5, 10, 41, 82, 205, 410, 52453, 104906, 262265, 524530, 2150573, 4301146, 10752865, 21505730]

約数ペア:

[(1, 21505730), (2, 10752865), (5, 4301146), (10, 2150573), (41, 524530), (82, 262265), (205, 104906), (410, 52453)]