20128145

素因数分解:

$5^1\times {\mathrm{31}}^2\times {\mathrm{59}}^1\times {\mathrm{71}}^1$

素因数の和:197

約数の個数: 24

約数和(自身を含む): 25738560

約数和(自身を除く): 5610415

約数列:

[1, 5, 31, 59, 71, 155, 295, 355, 961, 1829, 2201, 4189, 4805, 9145, 11005, 20945, 56699, 68231, 129859, 283495, 341155, 649295, 4025629, 20128145]

約数ペア:

[(1, 20128145), (5, 4025629), (31, 649295), (59, 341155), (71, 283495), (155, 129859), (295, 68231), (355, 56699), (961, 20945), (1829, 11005), (2201, 9145), (4189, 4805)]