19760720

素因数分解:

$2^4\times 5^1\times 7^2\times {\mathrm{71}}^2$

素因数の和:169

約数の個数: 90

約数和(自身を含む): 54208026

約数和(自身を除く): 34447306

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 35, 40, 49, 56, 70, 71, 80, 98, 112, 140, 142, 196, 245, 280, 284, 355, 392, 490, 497, 560, 568, 710, 784, 980, 994, 1136, 1420, 1960, 1988, 2485, 2840, 3479, 3920, 3976, 4970, 5041, 5680, 6958, 7952, 9940, 10082, 13916, 17395, 19880, 20164, 25205, 27832, 34790, 35287, 39760, 40328, 50410, 55664, 69580, 70574, 80656, 100820, 139160, 141148, 176435, 201640, 247009, 278320, 282296, 352870, 403280, 494018, 564592, 705740, 988036, 1235045, 1411480, 1976072, 2470090, 2822960, 3952144, 4940180, 9880360, 19760720]

約数ペア:

[(1, 19760720), (2, 9880360), (4, 4940180), (5, 3952144), (7, 2822960), (8, 2470090), (10, 1976072), (14, 1411480), (16, 1235045), (20, 988036), (28, 705740), (35, 564592), (40, 494018), (49, 403280), (56, 352870), (70, 282296), (71, 278320), (80, 247009), (98, 201640), (112, 176435), (140, 141148), (142, 139160), (196, 100820), (245, 80656), (280, 70574), (284, 69580), (355, 55664), (392, 50410), (490, 40328), (497, 39760), (560, 35287), (568, 34790), (710, 27832), (784, 25205), (980, 20164), (994, 19880), (1136, 17395), (1420, 13916), (1960, 10082), (1988, 9940), (2485, 7952), (2840, 6958), (3479, 5680), (3920, 5041), (3976, 4970)]