21000905719899

素因数分解:

$3^1\times 7^2\times {\mathrm{137}}^1\times {\mathrm{293}}^1\times {\mathrm{3559037}}^1$

素因数の和:3559484

約数の個数: 48

約数和(自身を含む): 32922582059808

約数和(自身を除く): 11921676339909

約数列:

[1, 3, 7, 21, 49, 137, 147, 293, 411, 879, 959, 2051, 2877, 6153, 6713, 14357, 20139, 40141, 43071, 120423, 280987, 842961, 1966909, 3559037, 5900727, 10677111, 24913259, 74739777, 174392813, 487588069, 523178439, 1042797841, 1462764207, 3128393523, 3413116483, 7299584887, 10239349449, 21898754661, 23891815381, 51097094209, 71675446143, 142863304217, 153291282627, 428589912651, 1000043129519, 3000129388557, 7000301906633, 21000905719899]

約数ペア:

[(1, 21000905719899), (3, 7000301906633), (7, 3000129388557), (21, 1000043129519), (49, 428589912651), (137, 153291282627), (147, 142863304217), (293, 71675446143), (411, 51097094209), (879, 23891815381), (959, 21898754661), (2051, 10239349449), (2877, 7299584887), (6153, 3413116483), (6713, 3128393523), (14357, 1462764207), (20139, 1042797841), (40141, 523178439), (43071, 487588069), (120423, 174392813), (280987, 74739777), (842961, 24913259), (1966909, 10677111), (3559037, 5900727)]