20317580

素因数分解:

$2^2\times 5^1\times {\mathrm{491}}^1\times {\mathrm{2069}}^1$

素因数の和:2569

約数の個数: 24

約数和(自身を含む): 42774480

約数和(自身を除く): 22456900

約数列:

[1, 2, 4, 5, 10, 20, 491, 982, 1964, 2069, 2455, 4138, 4910, 8276, 9820, 10345, 20690, 41380, 1015879, 2031758, 4063516, 5079395, 10158790, 20317580]

約数ペア:

[(1, 20317580), (2, 10158790), (4, 5079395), (5, 4063516), (10, 2031758), (20, 1015879), (491, 41380), (982, 20690), (1964, 10345), (2069, 9820), (2455, 8276), (4138, 4910)]