20749220

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{1049}}^1$

素因数の和:1124

約数の個数: 48

約数和(自身を含む): 46569600

約数和(自身を除く): 25820380

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 989, 1049, 1978, 2098, 3956, 4196, 4945, 5245, 9890, 10490, 19780, 20980, 24127, 45107, 48254, 90214, 96508, 120635, 180428, 225535, 241270, 451070, 482540, 902140, 1037461, 2074922, 4149844, 5187305, 10374610, 20749220]

約数ペア:

[(1, 20749220), (2, 10374610), (4, 5187305), (5, 4149844), (10, 2074922), (20, 1037461), (23, 902140), (43, 482540), (46, 451070), (86, 241270), (92, 225535), (115, 180428), (172, 120635), (215, 96508), (230, 90214), (430, 48254), (460, 45107), (860, 24127), (989, 20980), (1049, 19780), (1978, 10490), (2098, 9890), (3956, 5245), (4196, 4945)]