19789520

素因数分解:

$2^4\times 5^1\times {\mathrm{247369}}^1$

素因数の和:247382

約数の個数: 20

約数和(自身を含む): 46010820

約数和(自身を除く): 26221300

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247369, 494738, 989476, 1236845, 1978952, 2473690, 3957904, 4947380, 9894760, 19789520]

約数ペア:

[(1, 19789520), (2, 9894760), (4, 4947380), (5, 3957904), (8, 2473690), (10, 1978952), (16, 1236845), (20, 989476), (40, 494738), (80, 247369)]