19998555

素因数分解:

$3^1\times 5^1\times {\mathrm{661}}^1\times {\mathrm{2017}}^1$

素因数の和:2686

約数の個数: 16

約数和(自身を含む): 32061984

約数和(自身を除く): 12063429

約数列:

[1, 3, 5, 15, 661, 1983, 2017, 3305, 6051, 9915, 10085, 30255, 1333237, 3999711, 6666185, 19998555]

約数ペア:

[(1, 19998555), (3, 6666185), (5, 3999711), (15, 1333237), (661, 30255), (1983, 10085), (2017, 9915), (3305, 6051)]