20961731

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{127}}^1$

素因数の和:243

約数の個数: 32

約数和(自身を含む): 27279360

約数和(自身を除く): 6317629

約数列:

[1, 7, 17, 19, 73, 119, 127, 133, 323, 511, 889, 1241, 1387, 2159, 2261, 2413, 8687, 9271, 9709, 15113, 16891, 23579, 41021, 64897, 157607, 165053, 176149, 287147, 1103249, 1233043, 2994533, 20961731]

約数ペア:

[(1, 20961731), (7, 2994533), (17, 1233043), (19, 1103249), (73, 287147), (119, 176149), (127, 165053), (133, 157607), (323, 64897), (511, 41021), (889, 23579), (1241, 16891), (1387, 15113), (2159, 9709), (2261, 9271), (2413, 8687)]