21021287

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{59}}^1\times {\mathrm{2213}}^1$

素因数の和:2302

約数の個数: 16

約数和(自身を含む): 25505280

約数和(自身を除く): 4483993

約数列:

[1, 7, 23, 59, 161, 413, 1357, 2213, 9499, 15491, 50899, 130567, 356293, 913969, 3003041, 21021287]

約数ペア:

[(1, 21021287), (7, 3003041), (23, 913969), (59, 356293), (161, 130567), (413, 50899), (1357, 15491), (2213, 9499)]