27880209

素因数分解:

$3^2\times 7^1\times {\mathrm{23}}^1\times {\mathrm{71}}^1\times {\mathrm{271}}^1$

素因数の和:378

約数の個数: 48

約数和(自身を含む): 48881664

約数和(自身を除く): 21001455

約数列:

[1, 3, 7, 9, 21, 23, 63, 69, 71, 161, 207, 213, 271, 483, 497, 639, 813, 1449, 1491, 1633, 1897, 2439, 4473, 4899, 5691, 6233, 11431, 14697, 17073, 18699, 19241, 34293, 43631, 56097, 57723, 102879, 130893, 134687, 173169, 392679, 404061, 442543, 1212183, 1327629, 3097801, 3982887, 9293403, 27880209]

約数ペア:

[(1, 27880209), (3, 9293403), (7, 3982887), (9, 3097801), (21, 1327629), (23, 1212183), (63, 442543), (69, 404061), (71, 392679), (161, 173169), (207, 134687), (213, 130893), (271, 102879), (483, 57723), (497, 56097), (639, 43631), (813, 34293), (1449, 19241), (1491, 18699), (1633, 17073), (1897, 14697), (2439, 11431), (4473, 6233), (4899, 5691)]