640136

素因数分解:

$2^3\times 7^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1$

素因数の和:114

約数の個数: 48

約数和(自身を含む): 1477440

約数和(自身を除く): 837304

約数列:

[1, 2, 4, 7, 8, 14, 23, 28, 46, 49, 56, 71, 92, 98, 142, 161, 184, 196, 284, 322, 392, 497, 568, 644, 994, 1127, 1288, 1633, 1988, 2254, 3266, 3479, 3976, 4508, 6532, 6958, 9016, 11431, 13064, 13916, 22862, 27832, 45724, 80017, 91448, 160034, 320068, 640136]

約数ペア:

[(1, 640136), (2, 320068), (4, 160034), (7, 91448), (8, 80017), (14, 45724), (23, 27832), (28, 22862), (46, 13916), (49, 13064), (56, 11431), (71, 9016), (92, 6958), (98, 6532), (142, 4508), (161, 3976), (184, 3479), (196, 3266), (284, 2254), (322, 1988), (392, 1633), (497, 1288), (568, 1127), (644, 994)]