66109220

素因数分解:

$2^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{80621}}^1$

素因数の和:80671

約数の個数: 24

約数和(自身を含む): 142217208

約数和(自身を除く): 76107988

約数列:

[1, 2, 4, 5, 10, 20, 41, 82, 164, 205, 410, 820, 80621, 161242, 322484, 403105, 806210, 1612420, 3305461, 6610922, 13221844, 16527305, 33054610, 66109220]

約数ペア:

[(1, 66109220), (2, 33054610), (4, 16527305), (5, 13221844), (10, 6610922), (20, 3305461), (41, 1612420), (82, 806210), (164, 403105), (205, 322484), (410, 161242), (820, 80621)]