278313445

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{79}}^1\times {\mathrm{137}}^1\times {\mathrm{139}}^1$

素因数の和:397

約数の個数: 32

約数和(自身を含む): 352396800

約数和(自身を除く): 74083355

約数列:

[1, 5, 37, 79, 137, 139, 185, 395, 685, 695, 2923, 5069, 5143, 10823, 10981, 14615, 19043, 25345, 25715, 54115, 54905, 95215, 400451, 406297, 704591, 1504397, 2002255, 2031485, 3522955, 7521985, 55662689, 278313445]

約数ペア:

[(1, 278313445), (5, 55662689), (37, 7521985), (79, 3522955), (137, 2031485), (139, 2002255), (185, 1504397), (395, 704591), (685, 406297), (695, 400451), (2923, 95215), (5069, 54905), (5143, 54115), (10823, 25715), (10981, 25345), (14615, 19043)]