12721191

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19541}}^1$

素因数の和:19582

約数の個数: 16

約数和(自身を含む): 20011008

約数和(自身を除く): 7289817

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 19541, 58623, 136787, 410361, 605771, 1817313, 4240397, 12721191]

約数ペア:

[(1, 12721191), (3, 4240397), (7, 1817313), (21, 605771), (31, 410361), (93, 136787), (217, 58623), (651, 19541)]