21516985

素因数分解:

$5^1\times 7^1\times {\mathrm{17}}^1\times {\mathrm{29}}^2\times {\mathrm{43}}^1$

素因数の和:130

約数の個数: 48

約数和(自身を含む): 33111936

約数和(自身を除く): 11594951

約数列:

[1, 5, 7, 17, 29, 35, 43, 85, 119, 145, 203, 215, 301, 493, 595, 731, 841, 1015, 1247, 1505, 2465, 3451, 3655, 4205, 5117, 5887, 6235, 8729, 14297, 17255, 21199, 25585, 29435, 36163, 43645, 71485, 100079, 105995, 148393, 180815, 253141, 500395, 614771, 741965, 1265705, 3073855, 4303397, 21516985]

約数ペア:

[(1, 21516985), (5, 4303397), (7, 3073855), (17, 1265705), (29, 741965), (35, 614771), (43, 500395), (85, 253141), (119, 180815), (145, 148393), (203, 105995), (215, 100079), (301, 71485), (493, 43645), (595, 36163), (731, 29435), (841, 25585), (1015, 21199), (1247, 17255), (1505, 14297), (2465, 8729), (3451, 6235), (3655, 5887), (4205, 5117)]