21660779

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{97}}^1$

素因数の和:219

約数の個数: 32

約数和(自身を含む): 27847680

約数和(自身を除く): 6186901

約数列:

[1, 7, 19, 23, 73, 97, 133, 161, 437, 511, 679, 1387, 1679, 1843, 2231, 3059, 7081, 9709, 11753, 12901, 15617, 31901, 42389, 49567, 134539, 162863, 223307, 296723, 941773, 1140041, 3094397, 21660779]

約数ペア:

[(1, 21660779), (7, 3094397), (19, 1140041), (23, 941773), (73, 296723), (97, 223307), (133, 162863), (161, 134539), (437, 49567), (511, 42389), (679, 31901), (1387, 15617), (1679, 12901), (1843, 11753), (2231, 9709), (3059, 7081)]