20397013

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{251}}^1$

素因数の和:337

約数の個数: 32

約数和(自身を含む): 27095040

約数和(自身を除く): 6698027

約数列:

[1, 7, 13, 19, 47, 91, 133, 247, 251, 329, 611, 893, 1729, 1757, 3263, 4277, 4769, 6251, 11609, 11797, 22841, 33383, 61997, 81263, 82579, 153361, 224143, 433979, 1073527, 1569001, 2913859, 20397013]

約数ペア:

[(1, 20397013), (7, 2913859), (13, 1569001), (19, 1073527), (47, 433979), (91, 224143), (133, 153361), (247, 82579), (251, 81263), (329, 61997), (611, 33383), (893, 22841), (1729, 11797), (1757, 11609), (3263, 6251), (4277, 4769)]