21277400

素因数分解:

$2^3\times 5^2\times {\mathrm{191}}^1\times {\mathrm{557}}^1$

素因数の和:764

約数の個数: 48

約数和(自身を含む): 49818240

約数和(自身を除く): 28540840

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 191, 200, 382, 557, 764, 955, 1114, 1528, 1910, 2228, 2785, 3820, 4456, 4775, 5570, 7640, 9550, 11140, 13925, 19100, 22280, 27850, 38200, 55700, 106387, 111400, 212774, 425548, 531935, 851096, 1063870, 2127740, 2659675, 4255480, 5319350, 10638700, 21277400]

約数ペア:

[(1, 21277400), (2, 10638700), (4, 5319350), (5, 4255480), (8, 2659675), (10, 2127740), (20, 1063870), (25, 851096), (40, 531935), (50, 425548), (100, 212774), (191, 111400), (200, 106387), (382, 55700), (557, 38200), (764, 27850), (955, 22280), (1114, 19100), (1528, 13925), (1910, 11140), (2228, 9550), (2785, 7640), (3820, 5570), (4456, 4775)]