20178213

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1\times {\mathrm{83}}^1\times {\mathrm{139}}^1$

素因数の和:289

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 10303707

約数列:

[1, 3, 11, 33, 53, 83, 139, 159, 249, 417, 583, 913, 1529, 1749, 2739, 4399, 4587, 7367, 11537, 13197, 22101, 34611, 48389, 81037, 126907, 145167, 243111, 380721, 611461, 1834383, 6726071, 20178213]

約数ペア:

[(1, 20178213), (3, 6726071), (11, 1834383), (33, 611461), (53, 380721), (83, 243111), (139, 145167), (159, 126907), (249, 81037), (417, 48389), (583, 34611), (913, 22101), (1529, 13197), (1749, 11537), (2739, 7367), (4399, 4587)]