21853503

素因数分解:

$3^3\times 7^1\times {\mathrm{43}}^1\times {\mathrm{2689}}^1$

素因数の和:2748

約数の個数: 32

約数和(自身を含む): 37875200

約数和(自身を除く): 16021697

約数列:

[1, 3, 7, 9, 21, 27, 43, 63, 129, 189, 301, 387, 903, 1161, 2689, 2709, 8067, 8127, 18823, 24201, 56469, 72603, 115627, 169407, 346881, 508221, 809389, 1040643, 2428167, 3121929, 7284501, 21853503]

約数ペア:

[(1, 21853503), (3, 7284501), (7, 3121929), (9, 2428167), (21, 1040643), (27, 809389), (43, 508221), (63, 346881), (129, 169407), (189, 115627), (301, 72603), (387, 56469), (903, 24201), (1161, 18823), (2689, 8127), (2709, 8067)]