20789680

素因数分解:

$2^4\times 5^1\times {\mathrm{151}}^1\times {\mathrm{1721}}^1$

素因数の和:1885

約数の個数: 40

約数和(自身を含む): 48684384

約数和(自身を除く): 27894704

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 151, 302, 604, 755, 1208, 1510, 1721, 2416, 3020, 3442, 6040, 6884, 8605, 12080, 13768, 17210, 27536, 34420, 68840, 137680, 259871, 519742, 1039484, 1299355, 2078968, 2598710, 4157936, 5197420, 10394840, 20789680]

約数ペア:

[(1, 20789680), (2, 10394840), (4, 5197420), (5, 4157936), (8, 2598710), (10, 2078968), (16, 1299355), (20, 1039484), (40, 519742), (80, 259871), (151, 137680), (302, 68840), (604, 34420), (755, 27536), (1208, 17210), (1510, 13768), (1721, 12080), (2416, 8605), (3020, 6884), (3442, 6040)]