21380884

素因数分解:

$2^2\times 7^1\times {\mathrm{409}}^1\times {\mathrm{1867}}^1$

素因数の和:2287

約数の個数: 24

約数和(自身を含む): 42889280

約数和(自身を除く): 21508396

約数列:

[1, 2, 4, 7, 14, 28, 409, 818, 1636, 1867, 2863, 3734, 5726, 7468, 11452, 13069, 26138, 52276, 763603, 1527206, 3054412, 5345221, 10690442, 21380884]

約数ペア:

[(1, 21380884), (2, 10690442), (4, 5345221), (7, 3054412), (14, 1527206), (28, 763603), (409, 52276), (818, 26138), (1636, 13069), (1867, 11452), (2863, 7468), (3734, 5726)]