21007079420

素因数分解:

$2^2\times 5^1\times {\mathrm{353}}^1\times {\mathrm{2975507}}^1$

素因数の和:2975869

約数の個数: 24

約数和(自身を含む): 44239852944

約数和(自身を除く): 23232773524

約数列:

[1, 2, 4, 5, 10, 20, 353, 706, 1412, 1765, 3530, 7060, 2975507, 5951014, 11902028, 14877535, 29755070, 59510140, 1050353971, 2100707942, 4201415884, 5251769855, 10503539710, 21007079420]

約数ペア:

[(1, 21007079420), (2, 10503539710), (4, 5251769855), (5, 4201415884), (10, 2100707942), (20, 1050353971), (353, 59510140), (706, 29755070), (1412, 14877535), (1765, 11902028), (3530, 5951014), (7060, 2975507)]