21391282

素因数分解:

$2^1\times {\mathrm{11}}^1\times {\mathrm{661}}^1\times {\mathrm{1471}}^1$

素因数の和:2145

約数の個数: 16

約数和(自身を含む): 35080704

約数和(自身を除く): 13689422

約数列:

[1, 2, 11, 22, 661, 1322, 1471, 2942, 7271, 14542, 16181, 32362, 972331, 1944662, 10695641, 21391282]

約数ペア:

[(1, 21391282), (2, 10695641), (11, 1944662), (22, 972331), (661, 32362), (1322, 16181), (1471, 14542), (2942, 7271)]