20408003

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{2477}}^1$

素因数の和:2602

約数の個数: 16

約数和(自身を含む): 25691904

約数和(自身を除く): 5283901

約数列:

[1, 7, 11, 77, 107, 749, 1177, 2477, 8239, 17339, 27247, 190729, 265039, 1855273, 2915429, 20408003]

約数ペア:

[(1, 20408003), (7, 2915429), (11, 1855273), (77, 265039), (107, 190729), (749, 27247), (1177, 17339), (2477, 8239)]