81142280

素因数分解:

$2^3\times 5^1\times {\mathrm{41}}^1\times {\mathrm{49477}}^1$

素因数の和:49529

約数の個数: 32

約数和(自身を含む): 187026840

約数和(自身を除く): 105884560

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 41, 82, 164, 205, 328, 410, 820, 1640, 49477, 98954, 197908, 247385, 395816, 494770, 989540, 1979080, 2028557, 4057114, 8114228, 10142785, 16228456, 20285570, 40571140, 81142280]

約数ペア:

[(1, 81142280), (2, 40571140), (4, 20285570), (5, 16228456), (8, 10142785), (10, 8114228), (20, 4057114), (40, 2028557), (41, 1979080), (82, 989540), (164, 494770), (205, 395816), (328, 247385), (410, 197908), (820, 98954), (1640, 49477)]