20521390

素因数分解:

$2^1\times 5^1\times {\mathrm{1277}}^1\times {\mathrm{1607}}^1$

素因数の和:2891

約数の個数: 16

約数和(自身を含む): 36990432

約数和(自身を除く): 16469042

約数列:

[1, 2, 5, 10, 1277, 1607, 2554, 3214, 6385, 8035, 12770, 16070, 2052139, 4104278, 10260695, 20521390]

約数ペア:

[(1, 20521390), (2, 10260695), (5, 4104278), (10, 2052139), (1277, 16070), (1607, 12770), (2554, 8035), (3214, 6385)]