9999820

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{6329}}^1$

素因数の和:6417

約数の個数: 24

約数和(自身を含む): 21268800

約数和(自身を除く): 11268980

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 6329, 12658, 25316, 31645, 63290, 126580, 499991, 999982, 1999964, 2499955, 4999910, 9999820]

約数ペア:

[(1, 9999820), (2, 4999910), (4, 2499955), (5, 1999964), (10, 999982), (20, 499991), (79, 126580), (158, 63290), (316, 31645), (395, 25316), (790, 12658), (1580, 6329)]