81581668

素因数分解:

$2^2\times 7^2\times {\mathrm{19}}^2\times {\mathrm{1153}}^1$

素因数の和:1209

約数の個数: 54

約数和(自身を含む): 175429926

約数和(自身を除く): 93848258

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 49, 76, 98, 133, 196, 266, 361, 532, 722, 931, 1153, 1444, 1862, 2306, 2527, 3724, 4612, 5054, 8071, 10108, 16142, 17689, 21907, 32284, 35378, 43814, 56497, 70756, 87628, 112994, 153349, 225988, 306698, 416233, 613396, 832466, 1073443, 1664932, 2146886, 2913631, 4293772, 5827262, 11654524, 20395417, 40790834, 81581668]

約数ペア:

[(1, 81581668), (2, 40790834), (4, 20395417), (7, 11654524), (14, 5827262), (19, 4293772), (28, 2913631), (38, 2146886), (49, 1664932), (76, 1073443), (98, 832466), (133, 613396), (196, 416233), (266, 306698), (361, 225988), (532, 153349), (722, 112994), (931, 87628), (1153, 70756), (1444, 56497), (1862, 43814), (2306, 35378), (2527, 32284), (3724, 21907), (4612, 17689), (5054, 16142), (8071, 10108)]