87941980

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{157}}^1\times {\mathrm{4001}}^1$

素因数の和:4174

約数の個数: 48

約数和(自身を含む): 212458176

約数和(自身を除く): 124516196

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 157, 314, 628, 785, 1099, 1570, 2198, 3140, 4001, 4396, 5495, 8002, 10990, 16004, 20005, 21980, 28007, 40010, 56014, 80020, 112028, 140035, 280070, 560140, 628157, 1256314, 2512628, 3140785, 4397099, 6281570, 8794198, 12563140, 17588396, 21985495, 43970990, 87941980]

約数ペア:

[(1, 87941980), (2, 43970990), (4, 21985495), (5, 17588396), (7, 12563140), (10, 8794198), (14, 6281570), (20, 4397099), (28, 3140785), (35, 2512628), (70, 1256314), (140, 628157), (157, 560140), (314, 280070), (628, 140035), (785, 112028), (1099, 80020), (1570, 56014), (2198, 40010), (3140, 28007), (4001, 21980), (4396, 20005), (5495, 16004), (8002, 10990)]