638411907

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{428177}}^1$

素因数の和:428258

約数の個数: 16

約数和(自身を含む): 986522112

約数和(自身を除く): 348110205

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 428177, 1284531, 2997239, 8991717, 30400567, 91201701, 212803969, 638411907]

約数ペア:

[(1, 638411907), (3, 212803969), (7, 91201701), (21, 30400567), (71, 8991717), (213, 2997239), (497, 1284531), (1491, 428177)]