19966881

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{151}}^1\times {\mathrm{4007}}^1$

素因数の和:4172

約数の個数: 16

約数和(自身を含む): 29242368

約数和(自身を除く): 9275487

約数列:

[1, 3, 11, 33, 151, 453, 1661, 4007, 4983, 12021, 44077, 132231, 605057, 1815171, 6655627, 19966881]

約数ペア:

[(1, 19966881), (3, 6655627), (11, 1815171), (33, 605057), (151, 132231), (453, 44077), (1661, 12021), (4007, 4983)]