28911981

素因数分解:

$3^1\times 7^1\times {\mathrm{71}}^1\times {\mathrm{19391}}^1$

素因数の和:19472

約数の個数: 16

約数和(自身を含む): 44679168

約数和(自身を除く): 15767187

約数列:

[1, 3, 7, 21, 71, 213, 497, 1491, 19391, 58173, 135737, 407211, 1376761, 4130283, 9637327, 28911981]

約数ペア:

[(1, 28911981), (3, 9637327), (7, 4130283), (21, 1376761), (71, 407211), (213, 135737), (497, 58173), (1491, 19391)]