21361263

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{157}}^1$

素因数の和:228

約数の個数: 64

約数和(自身を含む): 38830080

約数和(自身を除く): 17468817

約数列:

[1, 3, 7, 11, 19, 21, 31, 33, 57, 77, 93, 133, 157, 209, 217, 231, 341, 399, 471, 589, 627, 651, 1023, 1099, 1463, 1727, 1767, 2387, 2983, 3297, 4123, 4389, 4867, 5181, 6479, 7161, 8949, 12089, 12369, 14601, 19437, 20881, 32813, 34069, 36267, 45353, 53537, 62643, 92473, 98439, 102207, 136059, 160611, 229691, 277419, 374759, 647311, 689073, 1017203, 1124277, 1941933, 3051609, 7120421, 21361263]

約数ペア:

[(1, 21361263), (3, 7120421), (7, 3051609), (11, 1941933), (19, 1124277), (21, 1017203), (31, 689073), (33, 647311), (57, 374759), (77, 277419), (93, 229691), (133, 160611), (157, 136059), (209, 102207), (217, 98439), (231, 92473), (341, 62643), (399, 53537), (471, 45353), (589, 36267), (627, 34069), (651, 32813), (1023, 20881), (1099, 19437), (1463, 14601), (1727, 12369), (1767, 12089), (2387, 8949), (2983, 7161), (3297, 6479), (4123, 5181), (4389, 4867)]