21000480683

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{328271}}^1$

素因数の和:328347

約数の個数: 32

約数和(自身を含む): 27942512640

約数和(自身を除く): 6942031957

約数列:

[1, 7, 13, 19, 37, 91, 133, 247, 259, 481, 703, 1729, 3367, 4921, 9139, 63973, 328271, 2297897, 4267523, 6237149, 12146027, 29872661, 43660043, 81082937, 85022189, 157898351, 230774513, 567580559, 1105288457, 1615421591, 3000068669, 21000480683]

約数ペア:

[(1, 21000480683), (7, 3000068669), (13, 1615421591), (19, 1105288457), (37, 567580559), (91, 230774513), (133, 157898351), (247, 85022189), (259, 81082937), (481, 43660043), (703, 29872661), (1729, 12146027), (3367, 6237149), (4921, 4267523), (9139, 2297897), (63973, 328271)]