19957887

素因数分解:

$3^3\times {\mathrm{29}}^1\times {\mathrm{71}}^1\times {\mathrm{359}}^1$

素因数の和:468

約数の個数: 32

約数和(自身を含む): 31104000

約数和(自身を除く): 11146113

約数列:

[1, 3, 9, 27, 29, 71, 87, 213, 261, 359, 639, 783, 1077, 1917, 2059, 3231, 6177, 9693, 10411, 18531, 25489, 31233, 55593, 76467, 93699, 229401, 281097, 688203, 739181, 2217543, 6652629, 19957887]

約数ペア:

[(1, 19957887), (3, 6652629), (9, 2217543), (27, 739181), (29, 688203), (71, 281097), (87, 229401), (213, 93699), (261, 76467), (359, 55593), (639, 31233), (783, 25489), (1077, 18531), (1917, 10411), (2059, 9693), (3231, 6177)]