19997590

素因数分解:

$2^1\times 5^1\times {\mathrm{1291}}^1\times {\mathrm{1549}}^1$

素因数の和:2847

約数の個数: 16

約数和(自身を含む): 36046800

約数和(自身を除く): 16049210

約数列:

[1, 2, 5, 10, 1291, 1549, 2582, 3098, 6455, 7745, 12910, 15490, 1999759, 3999518, 9998795, 19997590]

約数ペア:

[(1, 19997590), (2, 9998795), (5, 3999518), (10, 1999759), (1291, 15490), (1549, 12910), (2582, 7745), (3098, 6455)]