18715641

素因数分解:

$3^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{2903}}^1$

素因数の和:3220

約数の個数: 16

約数和(自身を含む): 28621824

約数和(自身を除く): 9906183

約数列:

[1, 3, 7, 21, 307, 921, 2149, 2903, 6447, 8709, 20321, 60963, 891221, 2673663, 6238547, 18715641]

約数ペア:

[(1, 18715641), (3, 6238547), (7, 2673663), (21, 891221), (307, 60963), (921, 20321), (2149, 8709), (2903, 6447)]