20964454

素因数分解:

$2^1\times 7^2\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{131}}^1$

素因数の和:241

約数の個数: 48

約数和(自身を含む): 39004416

約数和(自身を除く): 18039962

約数列:

[1, 2, 7, 14, 23, 46, 49, 71, 98, 131, 142, 161, 262, 322, 497, 917, 994, 1127, 1633, 1834, 2254, 3013, 3266, 3479, 6026, 6419, 6958, 9301, 11431, 12838, 18602, 21091, 22862, 42182, 65107, 80017, 130214, 147637, 160034, 213923, 295274, 427846, 455749, 911498, 1497461, 2994922, 10482227, 20964454]

約数ペア:

[(1, 20964454), (2, 10482227), (7, 2994922), (14, 1497461), (23, 911498), (46, 455749), (49, 427846), (71, 295274), (98, 213923), (131, 160034), (142, 147637), (161, 130214), (262, 80017), (322, 65107), (497, 42182), (917, 22862), (994, 21091), (1127, 18602), (1633, 12838), (1834, 11431), (2254, 9301), (3013, 6958), (3266, 6419), (3479, 6026)]