15998120

素因数分解:

$2^3\times 5^1\times {\mathrm{399953}}^1$

素因数の和:399964

約数の個数: 16

約数和(自身を含む): 35995860

約数和(自身を除く): 19997740

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 399953, 799906, 1599812, 1999765, 3199624, 3999530, 7999060, 15998120]

約数ペア:

[(1, 15998120), (2, 7999060), (4, 3999530), (5, 3199624), (8, 1999765), (10, 1599812), (20, 799906), (40, 399953)]