21309211

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{73}}^1\times {\mathrm{223}}^1$

素因数の和:331

約数の個数: 32

約数和(自身を含む): 28643328

約数和(自身を除く): 7334117

約数列:

[1, 7, 11, 17, 73, 77, 119, 187, 223, 511, 803, 1241, 1309, 1561, 2453, 3791, 5621, 8687, 13651, 16279, 17171, 26537, 41701, 95557, 113953, 179069, 276743, 291907, 1253483, 1937201, 3044173, 21309211]

約数ペア:

[(1, 21309211), (7, 3044173), (11, 1937201), (17, 1253483), (73, 291907), (77, 276743), (119, 179069), (187, 113953), (223, 95557), (511, 41701), (803, 26537), (1241, 17171), (1309, 16279), (1561, 13651), (2453, 8687), (3791, 5621)]