18701012

素因数分解:

$2^2\times {\mathrm{11}}^1\times {\mathrm{643}}^1\times {\mathrm{661}}^1$

素因数の和:1319

約数の個数: 24

約数和(自身を含む): 35811552

約数和(自身を除く): 17110540

約数列:

[1, 2, 4, 11, 22, 44, 643, 661, 1286, 1322, 2572, 2644, 7073, 7271, 14146, 14542, 28292, 29084, 425023, 850046, 1700092, 4675253, 9350506, 18701012]

約数ペア:

[(1, 18701012), (2, 9350506), (4, 4675253), (11, 1700092), (22, 850046), (44, 425023), (643, 29084), (661, 28292), (1286, 14542), (1322, 14146), (2572, 7271), (2644, 7073)]