19720810

素因数分解:

$2^1\times 5^1\times {\mathrm{643}}^1\times {\mathrm{3067}}^1$

素因数の和:3717

約数の個数: 16

約数和(自身を含む): 35564256

約数和(自身を除く): 15843446

約数列:

[1, 2, 5, 10, 643, 1286, 3067, 3215, 6134, 6430, 15335, 30670, 1972081, 3944162, 9860405, 19720810]

約数ペア:

[(1, 19720810), (2, 9860405), (5, 3944162), (10, 1972081), (643, 30670), (1286, 15335), (3067, 6430), (3215, 6134)]