21276800

素因数分解:

$2^7\times 5^2\times {\mathrm{61}}^1\times {\mathrm{109}}^1$

素因数の和:194

約数の個数: 96

約数和(自身を含む): 53912100

約数和(自身を除く): 32635300

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 61, 64, 80, 100, 109, 122, 128, 160, 200, 218, 244, 305, 320, 400, 436, 488, 545, 610, 640, 800, 872, 976, 1090, 1220, 1525, 1600, 1744, 1952, 2180, 2440, 2725, 3050, 3200, 3488, 3904, 4360, 4880, 5450, 6100, 6649, 6976, 7808, 8720, 9760, 10900, 12200, 13298, 13952, 17440, 19520, 21800, 24400, 26596, 33245, 34880, 39040, 43600, 48800, 53192, 66490, 69760, 87200, 97600, 106384, 132980, 166225, 174400, 195200, 212768, 265960, 332450, 348800, 425536, 531920, 664900, 851072, 1063840, 1329800, 2127680, 2659600, 4255360, 5319200, 10638400, 21276800]

約数ペア:

[(1, 21276800), (2, 10638400), (4, 5319200), (5, 4255360), (8, 2659600), (10, 2127680), (16, 1329800), (20, 1063840), (25, 851072), (32, 664900), (40, 531920), (50, 425536), (61, 348800), (64, 332450), (80, 265960), (100, 212768), (109, 195200), (122, 174400), (128, 166225), (160, 132980), (200, 106384), (218, 97600), (244, 87200), (305, 69760), (320, 66490), (400, 53192), (436, 48800), (488, 43600), (545, 39040), (610, 34880), (640, 33245), (800, 26596), (872, 24400), (976, 21800), (1090, 19520), (1220, 17440), (1525, 13952), (1600, 13298), (1744, 12200), (1952, 10900), (2180, 9760), (2440, 8720), (2725, 7808), (3050, 6976), (3200, 6649), (3488, 6100), (3904, 5450), (4360, 4880)]