20788049680

素因数分解:

$2^4\times 5^1\times {\mathrm{259850621}}^1$

素因数の和:259850634

約数の個数: 20

約数和(自身を含む): 48332215692

約数和(自身を除く): 27544166012

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 259850621, 519701242, 1039402484, 1299253105, 2078804968, 2598506210, 4157609936, 5197012420, 10394024840, 20788049680]

約数ペア:

[(1, 20788049680), (2, 10394024840), (4, 5197012420), (5, 4157609936), (8, 2598506210), (10, 2078804968), (16, 1299253105), (20, 1039402484), (40, 519701242), (80, 259850621)]