20981158

素因数分解:

$2^1\times {\mathrm{11}}^2\times {\mathrm{181}}^1\times {\mathrm{479}}^1$

素因数の和:684

約数の個数: 24

約数和(自身を含む): 34856640

約数和(自身を除く): 13875482

約数列:

[1, 2, 11, 22, 121, 181, 242, 362, 479, 958, 1991, 3982, 5269, 10538, 21901, 43802, 57959, 86699, 115918, 173398, 953689, 1907378, 10490579, 20981158]

約数ペア:

[(1, 20981158), (2, 10490579), (11, 1907378), (22, 953689), (121, 173398), (181, 115918), (242, 86699), (362, 57959), (479, 43802), (958, 21901), (1991, 10538), (3982, 5269)]