21259868

素因数分解:

$2^2\times 7^1\times {\mathrm{263}}^1\times {\mathrm{2887}}^1$

素因数の和:3161

約数の個数: 24

約数和(自身を含む): 42696192

約数和(自身を除く): 21436324

約数列:

[1, 2, 4, 7, 14, 28, 263, 526, 1052, 1841, 2887, 3682, 5774, 7364, 11548, 20209, 40418, 80836, 759281, 1518562, 3037124, 5314967, 10629934, 21259868]

約数ペア:

[(1, 21259868), (2, 10629934), (4, 5314967), (7, 3037124), (14, 1518562), (28, 759281), (263, 80836), (526, 40418), (1052, 20209), (1841, 11548), (2887, 7364), (3682, 5774)]