21375515

素因数分解:

$5^1\times 7^2\times {\mathrm{43}}^1\times {\mathrm{2029}}^1$

素因数の和:2091

約数の個数: 24

約数和(自身を含む): 30547440

約数和(自身を除く): 9171925

約数列:

[1, 5, 7, 35, 43, 49, 215, 245, 301, 1505, 2029, 2107, 10145, 10535, 14203, 71015, 87247, 99421, 436235, 497105, 610729, 3053645, 4275103, 21375515]

約数ペア:

[(1, 21375515), (5, 4275103), (7, 3053645), (35, 610729), (43, 497105), (49, 436235), (215, 99421), (245, 87247), (301, 71015), (1505, 14203), (2029, 10535), (2107, 10145)]