261799993

素因数分解:

$7^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{97}}^1\times {\mathrm{223}}^1$

素因数の和:366

約数の個数: 48

約数和(自身を含む): 350353920

約数和(自身を除く): 88553927

約数列:

[1, 7, 13, 19, 49, 91, 97, 133, 223, 247, 637, 679, 931, 1261, 1561, 1729, 1843, 2899, 4237, 4753, 8827, 10927, 12103, 12901, 20293, 21631, 23959, 29659, 55081, 61789, 90307, 142051, 151417, 167713, 207613, 281203, 385567, 410989, 1059919, 1173991, 1968421, 2698969, 2876923, 5342857, 13778947, 20138461, 37399999, 261799993]

約数ペア:

[(1, 261799993), (7, 37399999), (13, 20138461), (19, 13778947), (49, 5342857), (91, 2876923), (97, 2698969), (133, 1968421), (223, 1173991), (247, 1059919), (637, 410989), (679, 385567), (931, 281203), (1261, 207613), (1561, 167713), (1729, 151417), (1843, 142051), (2899, 90307), (4237, 61789), (4753, 55081), (8827, 29659), (10927, 23959), (12103, 21631), (12901, 20293)]