20806840

素因数分解:

$2^3\times 5^1\times {\mathrm{43}}^1\times {\mathrm{12097}}^1$

素因数の和:12151

約数の個数: 32

約数和(自身を含む): 47908080

約数和(自身を除く): 27101240

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 43, 86, 172, 215, 344, 430, 860, 1720, 12097, 24194, 48388, 60485, 96776, 120970, 241940, 483880, 520171, 1040342, 2080684, 2600855, 4161368, 5201710, 10403420, 20806840]

約数ペア:

[(1, 20806840), (2, 10403420), (4, 5201710), (5, 4161368), (8, 2600855), (10, 2080684), (20, 1040342), (40, 520171), (43, 483880), (86, 241940), (172, 120970), (215, 96776), (344, 60485), (430, 48388), (860, 24194), (1720, 12097)]