21542780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{153877}}^1$

素因数の和:153893

約数の個数: 24

約数和(自身を含む): 51703008

約数和(自身を除く): 30160228

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 153877, 307754, 615508, 769385, 1077139, 1538770, 2154278, 3077540, 4308556, 5385695, 10771390, 21542780]

約数ペア:

[(1, 21542780), (2, 10771390), (4, 5385695), (5, 4308556), (7, 3077540), (10, 2154278), (14, 1538770), (20, 1077139), (28, 769385), (35, 615508), (70, 307754), (140, 153877)]