12815720

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{7451}}^1$

素因数の和:7505

約数の個数: 32

約数和(自身を含む): 29509920

約数和(自身を除く): 16694200

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 7451, 14902, 29804, 37255, 59608, 74510, 149020, 298040, 320393, 640786, 1281572, 1601965, 2563144, 3203930, 6407860, 12815720]

約数ペア:

[(1, 12815720), (2, 6407860), (4, 3203930), (5, 2563144), (8, 1601965), (10, 1281572), (20, 640786), (40, 320393), (43, 298040), (86, 149020), (172, 74510), (215, 59608), (344, 37255), (430, 29804), (860, 14902), (1720, 7451)]