20438467

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{37}}^1\times {\mathrm{47}}^1\times {\mathrm{73}}^1$

素因数の和:187

約数の個数: 32

約数和(自身を含む): 25915392

約数和(自身を除く): 5476925

約数列:

[1, 7, 23, 37, 47, 73, 161, 259, 329, 511, 851, 1081, 1679, 1739, 2701, 3431, 5957, 7567, 11753, 12173, 18907, 24017, 39997, 62123, 78913, 126947, 279979, 434861, 552391, 888629, 2919781, 20438467]

約数ペア:

[(1, 20438467), (7, 2919781), (23, 888629), (37, 552391), (47, 434861), (73, 279979), (161, 126947), (259, 78913), (329, 62123), (511, 39997), (851, 24017), (1081, 18907), (1679, 12173), (1739, 11753), (2701, 7567), (3431, 5957)]