21000245

素因数分解:

$5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{7229}}^1$

素因数の和:7324

約数の個数: 16

約数和(自身を含む): 29151360

約数和(自身を除く): 8151115

約数列:

[1, 5, 7, 35, 83, 415, 581, 2905, 7229, 36145, 50603, 253015, 600007, 3000035, 4200049, 21000245]

約数ペア:

[(1, 21000245), (5, 4200049), (7, 3000035), (35, 600007), (83, 253015), (415, 50603), (581, 36145), (2905, 7229)]