21000906388

素因数分解:

$2^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{67}}^1\times {\mathrm{1017683}}^1$

素因数の和:1017772

約数の個数: 48

約数和(自身を含む): 46504088064

約数和(自身を除く): 25503181676

約数列:

[1, 2, 4, 7, 11, 14, 22, 28, 44, 67, 77, 134, 154, 268, 308, 469, 737, 938, 1474, 1876, 2948, 5159, 10318, 20636, 1017683, 2035366, 4070732, 7123781, 11194513, 14247562, 22389026, 28495124, 44778052, 68184761, 78361591, 136369522, 156723182, 272739044, 313446364, 477293327, 750032371, 954586654, 1500064742, 1909173308, 3000129484, 5250226597, 10500453194, 21000906388]

約数ペア:

[(1, 21000906388), (2, 10500453194), (4, 5250226597), (7, 3000129484), (11, 1909173308), (14, 1500064742), (22, 954586654), (28, 750032371), (44, 477293327), (67, 313446364), (77, 272739044), (134, 156723182), (154, 136369522), (268, 78361591), (308, 68184761), (469, 44778052), (737, 28495124), (938, 22389026), (1474, 14247562), (1876, 11194513), (2948, 7123781), (5159, 4070732), (10318, 2035366), (20636, 1017683)]