19999581

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{881}}^1$

素因数の和:961

約数の個数: 32

約数和(自身を含む): 32514048

約数和(自身を除く): 12514467

約数列:

[1, 3, 7, 21, 23, 47, 69, 141, 161, 329, 483, 881, 987, 1081, 2643, 3243, 6167, 7567, 18501, 20263, 22701, 41407, 60789, 124221, 141841, 289849, 425523, 869547, 952361, 2857083, 6666527, 19999581]

約数ペア:

[(1, 19999581), (3, 6666527), (7, 2857083), (21, 952361), (23, 869547), (47, 425523), (69, 289849), (141, 141841), (161, 124221), (329, 60789), (483, 41407), (881, 22701), (987, 20263), (1081, 18501), (2643, 7567), (3243, 6167)]