21287805

素因数分解:

$3^1\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{2633}}^1$

素因数の和:2666

約数の個数: 48

約数和(自身を含む): 43239744

約数和(自身を除く): 21951939

約数列:

[1, 3, 5, 7, 11, 15, 21, 33, 35, 49, 55, 77, 105, 147, 165, 231, 245, 385, 539, 735, 1155, 1617, 2633, 2695, 7899, 8085, 13165, 18431, 28963, 39495, 55293, 86889, 92155, 129017, 144815, 202741, 276465, 387051, 434445, 608223, 645085, 1013705, 1419187, 1935255, 3041115, 4257561, 7095935, 21287805]

約数ペア:

[(1, 21287805), (3, 7095935), (5, 4257561), (7, 3041115), (11, 1935255), (15, 1419187), (21, 1013705), (33, 645085), (35, 608223), (49, 434445), (55, 387051), (77, 276465), (105, 202741), (147, 144815), (165, 129017), (231, 92155), (245, 86889), (385, 55293), (539, 39495), (735, 28963), (1155, 18431), (1617, 13165), (2633, 8085), (2695, 7899)]