21028784

素因数分解:

$2^4\times 7^1\times {\mathrm{359}}^1\times {\mathrm{523}}^1$

素因数の和:897

約数の個数: 40

約数和(自身を含む): 46782720

約数和(自身を除く): 25753936

約数列:

[1, 2, 4, 7, 8, 14, 16, 28, 56, 112, 359, 523, 718, 1046, 1436, 2092, 2513, 2872, 3661, 4184, 5026, 5744, 7322, 8368, 10052, 14644, 20104, 29288, 40208, 58576, 187757, 375514, 751028, 1314299, 1502056, 2628598, 3004112, 5257196, 10514392, 21028784]

約数ペア:

[(1, 21028784), (2, 10514392), (4, 5257196), (7, 3004112), (8, 2628598), (14, 1502056), (16, 1314299), (28, 751028), (56, 375514), (112, 187757), (359, 58576), (523, 40208), (718, 29288), (1046, 20104), (1436, 14644), (2092, 10052), (2513, 8368), (2872, 7322), (3661, 5744), (4184, 5026)]