21139910

素因数分解:

$2^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{17471}}^1$

素因数の和:17500

約数の個数: 24

約数和(自身を含む): 41827968

約数和(自身を除く): 20688058

約数列:

[1, 2, 5, 10, 11, 22, 55, 110, 121, 242, 605, 1210, 17471, 34942, 87355, 174710, 192181, 384362, 960905, 1921810, 2113991, 4227982, 10569955, 21139910]

約数ペア:

[(1, 21139910), (2, 10569955), (5, 4227982), (10, 2113991), (11, 1921810), (22, 960905), (55, 384362), (110, 192181), (121, 174710), (242, 87355), (605, 34942), (1210, 17471)]