21697263

素因数分解:

$3^2\times 7^1\times {\mathrm{479}}^1\times {\mathrm{719}}^1$

素因数の和:1211

約数の個数: 24

約数和(自身を含む): 35942400

約数和(自身を除く): 14245137

約数列:

[1, 3, 7, 9, 21, 63, 479, 719, 1437, 2157, 3353, 4311, 5033, 6471, 10059, 15099, 30177, 45297, 344401, 1033203, 2410807, 3099609, 7232421, 21697263]

約数ペア:

[(1, 21697263), (3, 7232421), (7, 3099609), (9, 2410807), (21, 1033203), (63, 344401), (479, 45297), (719, 30177), (1437, 15099), (2157, 10059), (3353, 6471), (4311, 5033)]