19978090

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{181619}}^1$

素因数の和:181637

約数の個数: 16

約数和(自身を含む): 39229920

約数和(自身を除く): 19251830

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 181619, 363238, 908095, 1816190, 1997809, 3995618, 9989045, 19978090]

約数ペア:

[(1, 19978090), (2, 9989045), (5, 3995618), (10, 1997809), (11, 1816190), (22, 908095), (55, 363238), (110, 181619)]