21887200

素因数分解:

$2^5\times 5^2\times {\mathrm{109}}^1\times {\mathrm{251}}^1$

素因数の和:380

約数の個数: 72

約数和(自身を含む): 54137160

約数和(自身を除く): 32249960

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 109, 160, 200, 218, 251, 400, 436, 502, 545, 800, 872, 1004, 1090, 1255, 1744, 2008, 2180, 2510, 2725, 3488, 4016, 4360, 5020, 5450, 6275, 8032, 8720, 10040, 10900, 12550, 17440, 20080, 21800, 25100, 27359, 40160, 43600, 50200, 54718, 87200, 100400, 109436, 136795, 200800, 218872, 273590, 437744, 547180, 683975, 875488, 1094360, 1367950, 2188720, 2735900, 4377440, 5471800, 10943600, 21887200]

約数ペア:

[(1, 21887200), (2, 10943600), (4, 5471800), (5, 4377440), (8, 2735900), (10, 2188720), (16, 1367950), (20, 1094360), (25, 875488), (32, 683975), (40, 547180), (50, 437744), (80, 273590), (100, 218872), (109, 200800), (160, 136795), (200, 109436), (218, 100400), (251, 87200), (400, 54718), (436, 50200), (502, 43600), (545, 40160), (800, 27359), (872, 25100), (1004, 21800), (1090, 20080), (1255, 17440), (1744, 12550), (2008, 10900), (2180, 10040), (2510, 8720), (2725, 8032), (3488, 6275), (4016, 5450), (4360, 5020)]