18611980

素因数分解:

$2^2\times 5^1\times {\mathrm{419}}^1\times {\mathrm{2221}}^1$

素因数の和:2649

約数の個数: 24

約数和(自身を含む): 39196080

約数和(自身を除く): 20584100

約数列:

[1, 2, 4, 5, 10, 20, 419, 838, 1676, 2095, 2221, 4190, 4442, 8380, 8884, 11105, 22210, 44420, 930599, 1861198, 3722396, 4652995, 9305990, 18611980]

約数ペア:

[(1, 18611980), (2, 9305990), (4, 4652995), (5, 3722396), (10, 1861198), (20, 930599), (419, 44420), (838, 22210), (1676, 11105), (2095, 8884), (2221, 8380), (4190, 4442)]