19701080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{991}}^1$

素因数の和:1080

約数の個数: 64

約数和(自身を含む): 51425280

約数和(自身を除く): 31724200

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 71, 140, 142, 280, 284, 355, 497, 568, 710, 991, 994, 1420, 1982, 1988, 2485, 2840, 3964, 3976, 4955, 4970, 6937, 7928, 9910, 9940, 13874, 19820, 19880, 27748, 34685, 39640, 55496, 69370, 70361, 138740, 140722, 277480, 281444, 351805, 492527, 562888, 703610, 985054, 1407220, 1970108, 2462635, 2814440, 3940216, 4925270, 9850540, 19701080]

約数ペア:

[(1, 19701080), (2, 9850540), (4, 4925270), (5, 3940216), (7, 2814440), (8, 2462635), (10, 1970108), (14, 1407220), (20, 985054), (28, 703610), (35, 562888), (40, 492527), (56, 351805), (70, 281444), (71, 277480), (140, 140722), (142, 138740), (280, 70361), (284, 69370), (355, 55496), (497, 39640), (568, 34685), (710, 27748), (991, 19880), (994, 19820), (1420, 13874), (1982, 9940), (1988, 9910), (2485, 7928), (2840, 6937), (3964, 4970), (3976, 4955)]