319519280

素因数分解:

$2^4\times 5^1\times {\mathrm{3993991}}^1$

素因数の和:3994004

約数の個数: 20

約数和(自身を含む): 742882512

約数和(自身を除く): 423363232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 3993991, 7987982, 15975964, 19969955, 31951928, 39939910, 63903856, 79879820, 159759640, 319519280]

約数ペア:

[(1, 319519280), (2, 159759640), (4, 79879820), (5, 63903856), (8, 39939910), (10, 31951928), (16, 19969955), (20, 15975964), (40, 7987982), (80, 3993991)]