19992784

素因数分解:

$2^4\times 7^3\times {\mathrm{3643}}^1$

素因数の和:3672

約数の個数: 40

約数和(自身を含む): 45185600

約数和(自身を除く): 25192816

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 343, 392, 686, 784, 1372, 2744, 3643, 5488, 7286, 14572, 25501, 29144, 51002, 58288, 102004, 178507, 204008, 357014, 408016, 714028, 1249549, 1428056, 2499098, 2856112, 4998196, 9996392, 19992784]

約数ペア:

[(1, 19992784), (2, 9996392), (4, 4998196), (7, 2856112), (8, 2499098), (14, 1428056), (16, 1249549), (28, 714028), (49, 408016), (56, 357014), (98, 204008), (112, 178507), (196, 102004), (343, 58288), (392, 51002), (686, 29144), (784, 25501), (1372, 14572), (2744, 7286), (3643, 5488)]