21097279

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{2221}}^1$

素因数の和:2310

約数の個数: 16

約数和(自身を含む): 25597440

約数和(自身を除く): 4500161

約数列:

[1, 7, 23, 59, 161, 413, 1357, 2221, 9499, 15547, 51083, 131039, 357581, 917273, 3013897, 21097279]

約数ペア:

[(1, 21097279), (7, 3013897), (23, 917273), (59, 357581), (161, 131039), (413, 51083), (1357, 15547), (2221, 9499)]