19712990

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{179209}}^1$

素因数の和:179227

約数の個数: 16

約数和(自身を含む): 38709360

約数和(自身を除く): 18996370

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 179209, 358418, 896045, 1792090, 1971299, 3942598, 9856495, 19712990]

約数ペア:

[(1, 19712990), (2, 9856495), (5, 3942598), (10, 1971299), (11, 1792090), (22, 896045), (55, 358418), (110, 179209)]