21123873

素因数分解:

$3^2\times {\mathrm{61}}^1\times {\mathrm{109}}^1\times {\mathrm{353}}^1$

素因数の和:529

約数の個数: 24

約数和(自身を含む): 31385640

約数和(自身を除く): 10261767

約数列:

[1, 3, 9, 61, 109, 183, 327, 353, 549, 981, 1059, 3177, 6649, 19947, 21533, 38477, 59841, 64599, 115431, 193797, 346293, 2347097, 7041291, 21123873]

約数ペア:

[(1, 21123873), (3, 7041291), (9, 2347097), (61, 346293), (109, 193797), (183, 115431), (327, 64599), (353, 59841), (549, 38477), (981, 21533), (1059, 19947), (3177, 6649)]