21025323

素因数分解:

$3^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{449}}^1$

素因数の和:520

約数の個数: 36

約数和(自身を含む): 34234200

約数和(自身を除く): 13208877

約数列:

[1, 3, 9, 11, 33, 43, 99, 121, 129, 363, 387, 449, 473, 1089, 1347, 1419, 4041, 4257, 4939, 5203, 14817, 15609, 19307, 44451, 46827, 54329, 57921, 162987, 173763, 212377, 488961, 637131, 1911393, 2336147, 7008441, 21025323]

約数ペア:

[(1, 21025323), (3, 7008441), (9, 2336147), (11, 1911393), (33, 637131), (43, 488961), (99, 212377), (121, 173763), (129, 162987), (363, 57921), (387, 54329), (449, 46827), (473, 44451), (1089, 19307), (1347, 15609), (1419, 14817), (4041, 5203), (4257, 4939)]