21009956

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{83}}^1\times {\mathrm{523}}^1$

素因数の和:632

約数の個数: 36

約数和(自身を含む): 40978896

約数和(自身を除く): 19968940

約数列:

[1, 2, 4, 11, 22, 44, 83, 121, 166, 242, 332, 484, 523, 913, 1046, 1826, 2092, 3652, 5753, 10043, 11506, 20086, 23012, 40172, 43409, 63283, 86818, 126566, 173636, 253132, 477499, 954998, 1909996, 5252489, 10504978, 21009956]

約数ペア:

[(1, 21009956), (2, 10504978), (4, 5252489), (11, 1909996), (22, 954998), (44, 477499), (83, 253132), (121, 173636), (166, 126566), (242, 86818), (332, 63283), (484, 43409), (523, 40172), (913, 23012), (1046, 20086), (1826, 11506), (2092, 10043), (3652, 5753)]