21621545

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{281}}^1\times {\mathrm{1399}}^1$

素因数の和:1696

約数の個数: 16

約数和(自身を含む): 28425600

約数和(自身を除く): 6804055

約数列:

[1, 5, 11, 55, 281, 1399, 1405, 3091, 6995, 15389, 15455, 76945, 393119, 1965595, 4324309, 21621545]

約数ペア:

[(1, 21621545), (5, 4324309), (11, 1965595), (55, 393119), (281, 76945), (1399, 15455), (1405, 15389), (3091, 6995)]