21069805

素因数分解:

$5^1\times {\mathrm{29}}^1\times {\mathrm{331}}^1\times {\mathrm{439}}^1$

素因数の和:804

約数の個数: 16

約数和(自身を含む): 26294400

約数和(自身を除く): 5224595

約数列:

[1, 5, 29, 145, 331, 439, 1655, 2195, 9599, 12731, 47995, 63655, 145309, 726545, 4213961, 21069805]

約数ペア:

[(1, 21069805), (5, 4213961), (29, 726545), (145, 145309), (331, 63655), (439, 47995), (1655, 12731), (2195, 9599)]