78940000

素因数分解:

$2^5\times 5^4\times {\mathrm{3947}}^1$

素因数の和:3977

約数の個数: 60

約数和(自身を含む): 194253444

約数和(自身を除く): 115313444

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 625, 800, 1000, 1250, 2000, 2500, 3947, 4000, 5000, 7894, 10000, 15788, 19735, 20000, 31576, 39470, 63152, 78940, 98675, 126304, 157880, 197350, 315760, 394700, 493375, 631520, 789400, 986750, 1578800, 1973500, 2466875, 3157600, 3947000, 4933750, 7894000, 9867500, 15788000, 19735000, 39470000, 78940000]

約数ペア:

[(1, 78940000), (2, 39470000), (4, 19735000), (5, 15788000), (8, 9867500), (10, 7894000), (16, 4933750), (20, 3947000), (25, 3157600), (32, 2466875), (40, 1973500), (50, 1578800), (80, 986750), (100, 789400), (125, 631520), (160, 493375), (200, 394700), (250, 315760), (400, 197350), (500, 157880), (625, 126304), (800, 98675), (1000, 78940), (1250, 63152), (2000, 39470), (2500, 31576), (3947, 20000), (4000, 19735), (5000, 15788), (7894, 10000)]