21810400

素因数分解:

$2^5\times 5^2\times {\mathrm{137}}^1\times {\mathrm{199}}^1$

素因数の和:356

約数の個数: 72

約数和(自身を含む): 53902800

約数和(自身を除く): 32092400

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 137, 160, 199, 200, 274, 398, 400, 548, 685, 796, 800, 995, 1096, 1370, 1592, 1990, 2192, 2740, 3184, 3425, 3980, 4384, 4975, 5480, 6368, 6850, 7960, 9950, 10960, 13700, 15920, 19900, 21920, 27263, 27400, 31840, 39800, 54526, 54800, 79600, 109052, 109600, 136315, 159200, 218104, 272630, 436208, 545260, 681575, 872416, 1090520, 1363150, 2181040, 2726300, 4362080, 5452600, 10905200, 21810400]

約数ペア:

[(1, 21810400), (2, 10905200), (4, 5452600), (5, 4362080), (8, 2726300), (10, 2181040), (16, 1363150), (20, 1090520), (25, 872416), (32, 681575), (40, 545260), (50, 436208), (80, 272630), (100, 218104), (137, 159200), (160, 136315), (199, 109600), (200, 109052), (274, 79600), (398, 54800), (400, 54526), (548, 39800), (685, 31840), (796, 27400), (800, 27263), (995, 21920), (1096, 19900), (1370, 15920), (1592, 13700), (1990, 10960), (2192, 9950), (2740, 7960), (3184, 6850), (3425, 6368), (3980, 5480), (4384, 4975)]