20887400

素因数分解:

$2^3\times 5^2\times {\mathrm{181}}^1\times {\mathrm{577}}^1$

素因数の和:774

約数の個数: 48

約数和(自身を含む): 48916140

約数和(自身を除く): 28028740

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 181, 200, 362, 577, 724, 905, 1154, 1448, 1810, 2308, 2885, 3620, 4525, 4616, 5770, 7240, 9050, 11540, 14425, 18100, 23080, 28850, 36200, 57700, 104437, 115400, 208874, 417748, 522185, 835496, 1044370, 2088740, 2610925, 4177480, 5221850, 10443700, 20887400]

約数ペア:

[(1, 20887400), (2, 10443700), (4, 5221850), (5, 4177480), (8, 2610925), (10, 2088740), (20, 1044370), (25, 835496), (40, 522185), (50, 417748), (100, 208874), (181, 115400), (200, 104437), (362, 57700), (577, 36200), (724, 28850), (905, 23080), (1154, 18100), (1448, 14425), (1810, 11540), (2308, 9050), (2885, 7240), (3620, 5770), (4525, 4616)]