81438861

素因数分解:

$3^1\times 7^1\times {\mathrm{43}}^1\times {\mathrm{90187}}^1$

素因数の和:90240

約数の個数: 16

約数和(自身を含む): 126984704

約数和(自身を除く): 45545843

約数列:

[1, 3, 7, 21, 43, 129, 301, 903, 90187, 270561, 631309, 1893927, 3878041, 11634123, 27146287, 81438861]

約数ペア:

[(1, 81438861), (3, 27146287), (7, 11634123), (21, 3878041), (43, 1893927), (129, 631309), (301, 270561), (903, 90187)]