51509080

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{2591}}^1$

素因数の和:2680

約数の個数: 64

約数和(自身を含む): 134369280

約数和(自身を除く): 82860200

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, 994, 1420, 1988, 2485, 2591, 2840, 3976, 4970, 5182, 9940, 10364, 12955, 18137, 19880, 20728, 25910, 36274, 51820, 72548, 90685, 103640, 145096, 181370, 183961, 362740, 367922, 725480, 735844, 919805, 1287727, 1471688, 1839610, 2575454, 3679220, 5150908, 6438635, 7358440, 10301816, 12877270, 25754540, 51509080]

約数ペア:

[(1, 51509080), (2, 25754540), (4, 12877270), (5, 10301816), (7, 7358440), (8, 6438635), (10, 5150908), (14, 3679220), (20, 2575454), (28, 1839610), (35, 1471688), (40, 1287727), (56, 919805), (70, 735844), (71, 725480), (140, 367922), (142, 362740), (280, 183961), (284, 181370), (355, 145096), (497, 103640), (568, 90685), (710, 72548), (994, 51820), (1420, 36274), (1988, 25910), (2485, 20728), (2591, 19880), (2840, 18137), (3976, 12955), (4970, 10364), (5182, 9940)]