20870199

素因数分解:

$3^2\times 7^1\times {\mathrm{257}}^1\times {\mathrm{1289}}^1$

素因数の和:1559

約数の個数: 24

約数和(自身を含む): 34613280

約数和(自身を除く): 13743081

約数列:

[1, 3, 7, 9, 21, 63, 257, 771, 1289, 1799, 2313, 3867, 5397, 9023, 11601, 16191, 27069, 81207, 331273, 993819, 2318911, 2981457, 6956733, 20870199]

約数ペア:

[(1, 20870199), (3, 6956733), (7, 2981457), (9, 2318911), (21, 993819), (63, 331273), (257, 81207), (771, 27069), (1289, 16191), (1799, 11601), (2313, 9023), (3867, 5397)]