12878680

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{811}}^1$

素因数の和:1219

約数の個数: 32

約数和(自身を含む): 29085840

約数和(自身を除く): 16207160

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 811, 1588, 1622, 1985, 3176, 3244, 3970, 4055, 6488, 7940, 8110, 15880, 16220, 32440, 321967, 643934, 1287868, 1609835, 2575736, 3219670, 6439340, 12878680]

約数ペア:

[(1, 12878680), (2, 6439340), (4, 3219670), (5, 2575736), (8, 1609835), (10, 1287868), (20, 643934), (40, 321967), (397, 32440), (794, 16220), (811, 15880), (1588, 8110), (1622, 7940), (1985, 6488), (3176, 4055), (3244, 3970)]