21108836

素因数分解:

$2^2\times 7^1\times {\mathrm{521}}^1\times {\mathrm{1447}}^1$

素因数の和:1979

約数の個数: 24

約数和(自身を含む): 42327936

約数和(自身を除く): 21219100

約数列:

[1, 2, 4, 7, 14, 28, 521, 1042, 1447, 2084, 2894, 3647, 5788, 7294, 10129, 14588, 20258, 40516, 753887, 1507774, 3015548, 5277209, 10554418, 21108836]

約数ペア:

[(1, 21108836), (2, 10554418), (4, 5277209), (7, 3015548), (14, 1507774), (28, 753887), (521, 40516), (1042, 20258), (1447, 14588), (2084, 10129), (2894, 7294), (3647, 5788)]