21212395

素因数分解:

$5^1\times {\mathrm{137}}^1\times {\mathrm{173}}^1\times {\mathrm{179}}^1$

素因数の和:494

約数の個数: 16

約数和(自身を含む): 25932960

約数和(自身を除く): 4720565

約数列:

[1, 5, 137, 173, 179, 685, 865, 895, 23701, 24523, 30967, 118505, 122615, 154835, 4242479, 21212395]

約数ペア:

[(1, 21212395), (5, 4242479), (137, 154835), (173, 122615), (179, 118505), (685, 30967), (865, 24523), (895, 23701)]