19640860

素因数分解:

$2^2\times 5^1\times {\mathrm{439}}^1\times {\mathrm{2237}}^1$

素因数の和:2685

約数の個数: 24

約数和(自身を含む): 41358240

約数和(自身を除く): 21717380

約数列:

[1, 2, 4, 5, 10, 20, 439, 878, 1756, 2195, 2237, 4390, 4474, 8780, 8948, 11185, 22370, 44740, 982043, 1964086, 3928172, 4910215, 9820430, 19640860]

約数ペア:

[(1, 19640860), (2, 9820430), (4, 4910215), (5, 3928172), (10, 1964086), (20, 982043), (439, 44740), (878, 22370), (1756, 11185), (2195, 8948), (2237, 8780), (4390, 4474)]