81991778

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{9157}}^1$

素因数の和:9218

約数の個数: 24

約数和(自身を含む): 138853596

約数和(自身を除く): 56861818

約数列:

[1, 2, 11, 22, 37, 74, 121, 242, 407, 814, 4477, 8954, 9157, 18314, 100727, 201454, 338809, 677618, 1107997, 2215994, 3726899, 7453798, 40995889, 81991778]

約数ペア:

[(1, 81991778), (2, 40995889), (11, 7453798), (22, 3726899), (37, 2215994), (74, 1107997), (121, 677618), (242, 338809), (407, 201454), (814, 100727), (4477, 18314), (8954, 9157)]