19909990

素因数分解:

$2^1\times 5^1\times {\mathrm{1063}}^1\times {\mathrm{1873}}^1$

素因数の和:2943

約数の個数: 16

約数和(自身を含む): 35890848

約数和(自身を除く): 15980858

約数列:

[1, 2, 5, 10, 1063, 1873, 2126, 3746, 5315, 9365, 10630, 18730, 1990999, 3981998, 9954995, 19909990]

約数ペア:

[(1, 19909990), (2, 9954995), (5, 3981998), (10, 1990999), (1063, 18730), (1873, 10630), (2126, 9365), (3746, 5315)]