320991

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{137}}^1$

素因数の和:222

約数の個数: 16

約数和(自身を含む): 476928

約数和(自身を除く): 155937

約数列:

[1, 3, 11, 33, 71, 137, 213, 411, 781, 1507, 2343, 4521, 9727, 29181, 106997, 320991]

約数ペア:

[(1, 320991), (3, 106997), (11, 29181), (33, 9727), (71, 4521), (137, 2343), (213, 1507), (411, 781)]