21717143

素因数分解:

$7^2\times {\mathrm{17}}^1\times {\mathrm{29}}^2\times {\mathrm{31}}^1$

素因数の和:120

約数の個数: 36

約数和(自身を含む): 28596672

約数和(自身を除く): 6879529

約数列:

[1, 7, 17, 29, 31, 49, 119, 203, 217, 493, 527, 833, 841, 899, 1421, 1519, 3451, 3689, 5887, 6293, 14297, 15283, 24157, 25823, 26071, 41209, 44051, 100079, 106981, 182497, 443207, 700553, 748867, 1277479, 3102449, 21717143]

約数ペア:

[(1, 21717143), (7, 3102449), (17, 1277479), (29, 748867), (31, 700553), (49, 443207), (119, 182497), (203, 106981), (217, 100079), (493, 44051), (527, 41209), (833, 26071), (841, 25823), (899, 24157), (1421, 15283), (1519, 14297), (3451, 6293), (3689, 5887)]