19495990

素因数分解:

$2^1\times 5^1\times {\mathrm{439}}^1\times {\mathrm{4441}}^1$

素因数の和:4887

約数の個数: 16

約数和(自身を含む): 35180640

約数和(自身を除く): 15684650

約数列:

[1, 2, 5, 10, 439, 878, 2195, 4390, 4441, 8882, 22205, 44410, 1949599, 3899198, 9747995, 19495990]

約数ペア:

[(1, 19495990), (2, 9747995), (5, 3899198), (10, 1949599), (439, 44410), (878, 22205), (2195, 8882), (4390, 4441)]