19947321

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{157}}^1\times {\mathrm{743}}^1$

素因数の和:925

約数の個数: 24

約数和(自身を含む): 30563520

約数和(自身を除く): 10616199

約数列:

[1, 3, 9, 19, 57, 157, 171, 471, 743, 1413, 2229, 2983, 6687, 8949, 14117, 26847, 42351, 116651, 127053, 349953, 1049859, 2216369, 6649107, 19947321]

約数ペア:

[(1, 19947321), (3, 6649107), (9, 2216369), (19, 1049859), (57, 349953), (157, 127053), (171, 116651), (471, 42351), (743, 26847), (1413, 14117), (2229, 8949), (2983, 6687)]