21197575

素因数分解:

$5^2\times 7^1\times {\mathrm{89}}^1\times {\mathrm{1361}}^1$

素因数の和:1467

約数の個数: 24

約数和(自身を含む): 30399840

約数和(自身を除く): 9202265

約数列:

[1, 5, 7, 25, 35, 89, 175, 445, 623, 1361, 2225, 3115, 6805, 9527, 15575, 34025, 47635, 121129, 238175, 605645, 847903, 3028225, 4239515, 21197575]

約数ペア:

[(1, 21197575), (5, 4239515), (7, 3028225), (25, 847903), (35, 605645), (89, 238175), (175, 121129), (445, 47635), (623, 34025), (1361, 15575), (2225, 9527), (3115, 6805)]