20997501

素因数分解:

$3^1\times 7^1\times {\mathrm{73}}^1\times {\mathrm{13697}}^1$

素因数の和:13780

約数の個数: 16

約数和(自身を含む): 32436864

約数和(自身を除く): 11439363

約数列:

[1, 3, 7, 21, 73, 219, 511, 1533, 13697, 41091, 95879, 287637, 999881, 2999643, 6999167, 20997501]

約数ペア:

[(1, 20997501), (3, 6999167), (7, 2999643), (21, 999881), (73, 287637), (219, 95879), (511, 41091), (1533, 13697)]