398099060

素因数分解:

$2^2\times 5^1\times {\mathrm{19904953}}^1$

素因数の和:19904962

約数の個数: 12

約数和(自身を含む): 836008068

約数和(自身を除く): 437909008

約数列:

[1, 2, 4, 5, 10, 20, 19904953, 39809906, 79619812, 99524765, 199049530, 398099060]

約数ペア:

[(1, 398099060), (2, 199049530), (4, 99524765), (5, 79619812), (10, 39809906), (20, 19904953)]