21129843

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{52957}}^1$

素因数の和:52986

約数の個数: 16

約数和(自身を含む): 33893120

約数和(自身を除く): 12763277

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 52957, 158871, 370699, 1006183, 1112097, 3018549, 7043281, 21129843]

約数ペア:

[(1, 21129843), (3, 7043281), (7, 3018549), (19, 1112097), (21, 1006183), (57, 370699), (133, 158871), (399, 52957)]