21151697

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{1663}}^1$

素因数の和:1772

約数の個数: 16

約数和(自身を含む): 25559040

約数和(自身を除く): 4407343

約数列:

[1, 7, 23, 79, 161, 553, 1663, 1817, 11641, 12719, 38249, 131377, 267743, 919639, 3021671, 21151697]

約数ペア:

[(1, 21151697), (7, 3021671), (23, 919639), (79, 267743), (161, 131377), (553, 38249), (1663, 12719), (1817, 11641)]