19678160

素因数分解:

$2^4\times 5^1\times {\mathrm{245977}}^1$

素因数の和:245990

約数の個数: 20

約数和(自身を含む): 45751908

約数和(自身を除く): 26073748

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 245977, 491954, 983908, 1229885, 1967816, 2459770, 3935632, 4919540, 9839080, 19678160]

約数ペア:

[(1, 19678160), (2, 9839080), (4, 4919540), (5, 3935632), (8, 2459770), (10, 1967816), (16, 1229885), (20, 983908), (40, 491954), (80, 245977)]