19702420

素因数分解:

$2^2\times 5^1\times {\mathrm{985121}}^1$

素因数の和:985130

約数の個数: 12

約数和(自身を含む): 41375124

約数和(自身を除く): 21672704

約数列:

[1, 2, 4, 5, 10, 20, 985121, 1970242, 3940484, 4925605, 9851210, 19702420]

約数ペア:

[(1, 19702420), (2, 9851210), (4, 4925605), (5, 3940484), (10, 1970242), (20, 985121)]