20993756

素因数分解:

$2^2\times 7^2\times {\mathrm{23}}^1\times {\mathrm{4657}}^1$

素因数の和:4698

約数の個数: 36

約数和(自身を含む): 44605008

約数和(自身を除く): 23611252

約数列:

[1, 2, 4, 7, 14, 23, 28, 46, 49, 92, 98, 161, 196, 322, 644, 1127, 2254, 4508, 4657, 9314, 18628, 32599, 65198, 107111, 130396, 214222, 228193, 428444, 456386, 749777, 912772, 1499554, 2999108, 5248439, 10496878, 20993756]

約数ペア:

[(1, 20993756), (2, 10496878), (4, 5248439), (7, 2999108), (14, 1499554), (23, 912772), (28, 749777), (46, 456386), (49, 428444), (92, 228193), (98, 214222), (161, 130396), (196, 107111), (322, 65198), (644, 32599), (1127, 18628), (2254, 9314), (4508, 4657)]