81298280

素因数分解:

$2^3\times 5^1\times 7^1\times {\mathrm{290351}}^1$

素因数の和:290369

約数の個数: 32

約数和(自身を含む): 209053440

約数和(自身を除く): 127755160

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 280, 290351, 580702, 1161404, 1451755, 2032457, 2322808, 2903510, 4064914, 5807020, 8129828, 10162285, 11614040, 16259656, 20324570, 40649140, 81298280]

約数ペア:

[(1, 81298280), (2, 40649140), (4, 20324570), (5, 16259656), (7, 11614040), (8, 10162285), (10, 8129828), (14, 5807020), (20, 4064914), (28, 2903510), (35, 2322808), (40, 2032457), (56, 1451755), (70, 1161404), (140, 580702), (280, 290351)]