20855200

素因数分解:

$2^5\times 5^2\times {\mathrm{131}}^1\times {\mathrm{199}}^1$

素因数の和:350

約数の個数: 72

約数和(自身を含む): 51559200

約数和(自身を除く): 30704000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 131, 160, 199, 200, 262, 398, 400, 524, 655, 796, 800, 995, 1048, 1310, 1592, 1990, 2096, 2620, 3184, 3275, 3980, 4192, 4975, 5240, 6368, 6550, 7960, 9950, 10480, 13100, 15920, 19900, 20960, 26069, 26200, 31840, 39800, 52138, 52400, 79600, 104276, 104800, 130345, 159200, 208552, 260690, 417104, 521380, 651725, 834208, 1042760, 1303450, 2085520, 2606900, 4171040, 5213800, 10427600, 20855200]

約数ペア:

[(1, 20855200), (2, 10427600), (4, 5213800), (5, 4171040), (8, 2606900), (10, 2085520), (16, 1303450), (20, 1042760), (25, 834208), (32, 651725), (40, 521380), (50, 417104), (80, 260690), (100, 208552), (131, 159200), (160, 130345), (199, 104800), (200, 104276), (262, 79600), (398, 52400), (400, 52138), (524, 39800), (655, 31840), (796, 26200), (800, 26069), (995, 20960), (1048, 19900), (1310, 15920), (1592, 13100), (1990, 10480), (2096, 9950), (2620, 7960), (3184, 6550), (3275, 6368), (3980, 5240), (4192, 4975)]