21000831

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{509}}^1\times {\mathrm{809}}^1$

素因数の和:1338

約数の個数: 16

約数和(自身を含む): 29743200

約数和(自身を除く): 8742369

約数列:

[1, 3, 17, 51, 509, 809, 1527, 2427, 8653, 13753, 25959, 41259, 411781, 1235343, 7000277, 21000831]

約数ペア:

[(1, 21000831), (3, 7000277), (17, 1235343), (51, 411781), (509, 41259), (809, 25959), (1527, 13753), (2427, 8653)]