251979

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^2\times {\mathrm{71}}^1$

素因数の和:107

約数の個数: 24

約数和(自身を含む): 421632

約数和(自身を除く): 169653

約数列:

[1, 3, 7, 13, 21, 39, 71, 91, 169, 213, 273, 497, 507, 923, 1183, 1491, 2769, 3549, 6461, 11999, 19383, 35997, 83993, 251979]

約数ペア:

[(1, 251979), (3, 83993), (7, 35997), (13, 19383), (21, 11999), (39, 6461), (71, 3549), (91, 2769), (169, 1491), (213, 1183), (273, 923), (497, 507)]