21278936

素因数分解:

$2^3\times 7^2\times {\mathrm{19}}^1\times {\mathrm{2857}}^1$

素因数の和:2896

約数の個数: 48

約数和(自身を含む): 48871800

約数和(自身を除く): 27592864

約数列:

[1, 2, 4, 7, 8, 14, 19, 28, 38, 49, 56, 76, 98, 133, 152, 196, 266, 392, 532, 931, 1064, 1862, 2857, 3724, 5714, 7448, 11428, 19999, 22856, 39998, 54283, 79996, 108566, 139993, 159992, 217132, 279986, 379981, 434264, 559972, 759962, 1119944, 1519924, 2659867, 3039848, 5319734, 10639468, 21278936]

約数ペア:

[(1, 21278936), (2, 10639468), (4, 5319734), (7, 3039848), (8, 2659867), (14, 1519924), (19, 1119944), (28, 759962), (38, 559972), (49, 434264), (56, 379981), (76, 279986), (98, 217132), (133, 159992), (152, 139993), (196, 108566), (266, 79996), (392, 54283), (532, 39998), (931, 22856), (1064, 19999), (1862, 11428), (2857, 7448), (3724, 5714)]