81257080

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{49547}}^1$

素因数の和:49599

約数の個数: 32

約数和(自身を含む): 187291440

約数和(自身を除く): 106034360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 49547, 99094, 198188, 247735, 396376, 495470, 990940, 1981880, 2031427, 4062854, 8125708, 10157135, 16251416, 20314270, 40628540, 81257080]

約数ペア:

[(1, 81257080), (2, 40628540), (4, 20314270), (5, 16251416), (8, 10157135), (10, 8125708), (20, 4062854), (40, 2031427), (41, 1981880), (82, 990940), (164, 495470), (205, 396376), (328, 247735), (410, 198188), (820, 99094), (1640, 49547)]