20779400

素因数分解:

$2^3\times 5^2\times {\mathrm{107}}^1\times {\mathrm{971}}^1$

素因数の和:1094

約数の個数: 48

約数和(自身を含む): 48813840

約数和(自身を除く): 28034440

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 107, 200, 214, 428, 535, 856, 971, 1070, 1942, 2140, 2675, 3884, 4280, 4855, 5350, 7768, 9710, 10700, 19420, 21400, 24275, 38840, 48550, 97100, 103897, 194200, 207794, 415588, 519485, 831176, 1038970, 2077940, 2597425, 4155880, 5194850, 10389700, 20779400]

約数ペア:

[(1, 20779400), (2, 10389700), (4, 5194850), (5, 4155880), (8, 2597425), (10, 2077940), (20, 1038970), (25, 831176), (40, 519485), (50, 415588), (100, 207794), (107, 194200), (200, 103897), (214, 97100), (428, 48550), (535, 38840), (856, 24275), (971, 21400), (1070, 19420), (1942, 10700), (2140, 9710), (2675, 7768), (3884, 5350), (4280, 4855)]