21726815

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{31}}^1\times {\mathrm{12743}}^1$

素因数の和:12790

約数の個数: 16

約数和(自身を含む): 29362176

約数和(自身を除く): 7635361

約数列:

[1, 5, 11, 31, 55, 155, 341, 1705, 12743, 63715, 140173, 395033, 700865, 1975165, 4345363, 21726815]

約数ペア:

[(1, 21726815), (5, 4345363), (11, 1975165), (31, 700865), (55, 395033), (155, 140173), (341, 63715), (1705, 12743)]