21090839

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{11909}}^1$

素因数の和:11950

約数の個数: 16

約数和(自身を含む): 27440640

約数和(自身を除く): 6349801

約数列:

[1, 7, 11, 23, 77, 161, 253, 1771, 11909, 83363, 130999, 273907, 916993, 1917349, 3012977, 21090839]

約数ペア:

[(1, 21090839), (7, 3012977), (11, 1917349), (23, 916993), (77, 273907), (161, 130999), (253, 83363), (1771, 11909)]