278631220

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{1990223}}^1$

素因数の和:1990239

約数の個数: 24

約数和(自身を含む): 668715264

約数和(自身を除く): 390084044

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 1990223, 3980446, 7960892, 9951115, 13931561, 19902230, 27863122, 39804460, 55726244, 69657805, 139315610, 278631220]

約数ペア:

[(1, 278631220), (2, 139315610), (4, 69657805), (5, 55726244), (7, 39804460), (10, 27863122), (14, 19902230), (20, 13931561), (28, 9951115), (35, 7960892), (70, 3980446), (140, 1990223)]