21336740

素因数分解:

$2^2\times 5^1\times {\mathrm{53}}^1\times {\mathrm{20129}}^1$

素因数の和:20191

約数の個数: 24

約数和(自身を含む): 45654840

約数和(自身を除く): 24318100

約数列:

[1, 2, 4, 5, 10, 20, 53, 106, 212, 265, 530, 1060, 20129, 40258, 80516, 100645, 201290, 402580, 1066837, 2133674, 4267348, 5334185, 10668370, 21336740]

約数ペア:

[(1, 21336740), (2, 10668370), (4, 5334185), (5, 4267348), (10, 2133674), (20, 1066837), (53, 402580), (106, 201290), (212, 100645), (265, 80516), (530, 40258), (1060, 20129)]