21517305

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1327}}^1$

素因数の和:1405

約数の個数: 32

約数和(自身を含む): 36716544

約数和(自身を除く): 15199239

約数列:

[1, 3, 5, 15, 23, 47, 69, 115, 141, 235, 345, 705, 1081, 1327, 3243, 3981, 5405, 6635, 16215, 19905, 30521, 62369, 91563, 152605, 187107, 311845, 457815, 935535, 1434487, 4303461, 7172435, 21517305]

約数ペア:

[(1, 21517305), (3, 7172435), (5, 4303461), (15, 1434487), (23, 935535), (47, 457815), (69, 311845), (115, 187107), (141, 152605), (235, 91563), (345, 62369), (705, 30521), (1081, 19905), (1327, 16215), (3243, 6635), (3981, 5405)]