256587440

素因数分解:

$2^4\times 5^1\times {\mathrm{311}}^1\times {\mathrm{10313}}^1$

素因数の和:10637

約数の個数: 40

約数和(自身を含む): 598542048

約数和(自身を除く): 341954608

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 311, 622, 1244, 1555, 2488, 3110, 4976, 6220, 10313, 12440, 20626, 24880, 41252, 51565, 82504, 103130, 165008, 206260, 412520, 825040, 3207343, 6414686, 12829372, 16036715, 25658744, 32073430, 51317488, 64146860, 128293720, 256587440]

約数ペア:

[(1, 256587440), (2, 128293720), (4, 64146860), (5, 51317488), (8, 32073430), (10, 25658744), (16, 16036715), (20, 12829372), (40, 6414686), (80, 3207343), (311, 825040), (622, 412520), (1244, 206260), (1555, 165008), (2488, 103130), (3110, 82504), (4976, 51565), (6220, 41252), (10313, 24880), (12440, 20626)]