21299421

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{131}}^1\times {\mathrm{379}}^1$

素因数の和:537

約数の個数: 32

約数和(自身を含む): 33707520

約数和(自身を除く): 12408099

約数列:

[1, 3, 11, 13, 33, 39, 131, 143, 379, 393, 429, 1137, 1441, 1703, 4169, 4323, 4927, 5109, 12507, 14781, 18733, 49649, 54197, 56199, 148947, 162591, 546139, 645437, 1638417, 1936311, 7099807, 21299421]

約数ペア:

[(1, 21299421), (3, 7099807), (11, 1936311), (13, 1638417), (33, 645437), (39, 546139), (131, 162591), (143, 148947), (379, 56199), (393, 54197), (429, 49649), (1137, 18733), (1441, 14781), (1703, 12507), (4169, 5109), (4323, 4927)]