20913179

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{61}}^1\times {\mathrm{67}}^1$

素因数の和:195

約数の個数: 32

約数和(自身を含む): 26712576

約数和(自身を除く): 5799397

約数列:

[1, 7, 17, 43, 61, 67, 119, 301, 427, 469, 731, 1037, 1139, 2623, 2881, 4087, 5117, 7259, 7973, 18361, 20167, 28609, 44591, 48977, 69479, 175741, 312137, 342839, 486353, 1230187, 2987597, 20913179]

約数ペア:

[(1, 20913179), (7, 2987597), (17, 1230187), (43, 486353), (61, 342839), (67, 312137), (119, 175741), (301, 69479), (427, 48977), (469, 44591), (731, 28609), (1037, 20167), (1139, 18361), (2623, 7973), (2881, 7259), (4087, 5117)]