21156515

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{59}}^1\times {\mathrm{2473}}^1$

素因数の和:2566

約数の個数: 16

約数和(自身を含む): 26719200

約数和(自身を除く): 5562685

約数列:

[1, 5, 29, 59, 145, 295, 1711, 2473, 8555, 12365, 71717, 145907, 358585, 729535, 4231303, 21156515]

約数ペア:

[(1, 21156515), (5, 4231303), (29, 729535), (59, 358585), (145, 145907), (295, 71717), (1711, 12365), (2473, 8555)]