19808890

素因数分解:

$2^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{14251}}^1$

素因数の和:14397

約数の個数: 16

約数和(自身を含む): 35915040

約数和(自身を除く): 16106150

約数列:

[1, 2, 5, 10, 139, 278, 695, 1390, 14251, 28502, 71255, 142510, 1980889, 3961778, 9904445, 19808890]

約数ペア:

[(1, 19808890), (2, 9904445), (5, 3961778), (10, 1980889), (139, 142510), (278, 71255), (695, 28502), (1390, 14251)]