21485457

素因数分解:

$3^2\times 7^1\times {\mathrm{257}}^1\times {\mathrm{1327}}^1$

素因数の和:1597

約数の個数: 24

約数和(自身を含む): 35632896

約数和(自身を除く): 14147439

約数列:

[1, 3, 7, 9, 21, 63, 257, 771, 1327, 1799, 2313, 3981, 5397, 9289, 11943, 16191, 27867, 83601, 341039, 1023117, 2387273, 3069351, 7161819, 21485457]

約数ペア:

[(1, 21485457), (3, 7161819), (7, 3069351), (9, 2387273), (21, 1023117), (63, 341039), (257, 83601), (771, 27867), (1327, 16191), (1799, 11943), (2313, 9289), (3981, 5397)]