21705824

素因数分解:

$2^5\times 7^2\times {\mathrm{109}}^1\times {\mathrm{127}}^1$

素因数の和:260

約数の個数: 72

約数和(自身を含む): 50561280

約数和(自身を除く): 28855456

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 32, 49, 56, 98, 109, 112, 127, 196, 218, 224, 254, 392, 436, 508, 763, 784, 872, 889, 1016, 1526, 1568, 1744, 1778, 2032, 3052, 3488, 3556, 4064, 5341, 6104, 6223, 7112, 10682, 12208, 12446, 13843, 14224, 21364, 24416, 24892, 27686, 28448, 42728, 49784, 55372, 85456, 96901, 99568, 110744, 170912, 193802, 199136, 221488, 387604, 442976, 678307, 775208, 1356614, 1550416, 2713228, 3100832, 5426456, 10852912, 21705824]

約数ペア:

[(1, 21705824), (2, 10852912), (4, 5426456), (7, 3100832), (8, 2713228), (14, 1550416), (16, 1356614), (28, 775208), (32, 678307), (49, 442976), (56, 387604), (98, 221488), (109, 199136), (112, 193802), (127, 170912), (196, 110744), (218, 99568), (224, 96901), (254, 85456), (392, 55372), (436, 49784), (508, 42728), (763, 28448), (784, 27686), (872, 24892), (889, 24416), (1016, 21364), (1526, 14224), (1568, 13843), (1744, 12446), (1778, 12208), (2032, 10682), (3052, 7112), (3488, 6223), (3556, 6104), (4064, 5341)]