81508820

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{99401}}^1$

素因数の和:99451

約数の個数: 24

約数和(自身を含む): 175345128

約数和(自身を除く): 93836308

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 99401, 198802, 397604, 497005, 994010, 1988020, 4075441, 8150882, 16301764, 20377205, 40754410, 81508820]

約数ペア:

[(1, 81508820), (2, 40754410), (4, 20377205), (5, 16301764), (10, 8150882), (20, 4075441), (41, 1988020), (82, 994010), (164, 497005), (205, 397604), (410, 198802), (820, 99401)]