20478160

素因数分解:

$2^4\times 5^1\times {\mathrm{255977}}^1$

素因数の和:255990

約数の個数: 20

約数和(自身を含む): 47611908

約数和(自身を除く): 27133748

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 255977, 511954, 1023908, 1279885, 2047816, 2559770, 4095632, 5119540, 10239080, 20478160]

約数ペア:

[(1, 20478160), (2, 10239080), (4, 5119540), (5, 4095632), (8, 2559770), (10, 2047816), (16, 1279885), (20, 1023908), (40, 511954), (80, 255977)]