21571600

素因数分解:

$2^4\times 5^2\times {\mathrm{199}}^1\times {\mathrm{271}}^1$

素因数の和:488

約数の個数: 60

約数和(自身を含む): 52278400

約数和(自身を除く): 30706800

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 199, 200, 271, 398, 400, 542, 796, 995, 1084, 1355, 1592, 1990, 2168, 2710, 3184, 3980, 4336, 4975, 5420, 6775, 7960, 9950, 10840, 13550, 15920, 19900, 21680, 27100, 39800, 53929, 54200, 79600, 107858, 108400, 215716, 269645, 431432, 539290, 862864, 1078580, 1348225, 2157160, 2696450, 4314320, 5392900, 10785800, 21571600]

約数ペア:

[(1, 21571600), (2, 10785800), (4, 5392900), (5, 4314320), (8, 2696450), (10, 2157160), (16, 1348225), (20, 1078580), (25, 862864), (40, 539290), (50, 431432), (80, 269645), (100, 215716), (199, 108400), (200, 107858), (271, 79600), (398, 54200), (400, 53929), (542, 39800), (796, 27100), (995, 21680), (1084, 19900), (1355, 15920), (1592, 13550), (1990, 10840), (2168, 9950), (2710, 7960), (3184, 6775), (3980, 5420), (4336, 4975)]