20997977

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{1907}}^1$

素因数の和:1949

約数の個数: 24

約数和(自身を含む): 28421568

約数和(自身を除く): 7423591

約数列:

[1, 7, 11, 13, 77, 91, 121, 143, 847, 1001, 1573, 1907, 11011, 13349, 20977, 24791, 146839, 173537, 230747, 272701, 1615229, 1908907, 2999711, 20997977]

約数ペア:

[(1, 20997977), (7, 2999711), (11, 1908907), (13, 1615229), (77, 272701), (91, 230747), (121, 173537), (143, 146839), (847, 24791), (1001, 20977), (1573, 13349), (1907, 11011)]