21004395

素因数分解:

$3^1\times 5^1\times {\mathrm{83}}^1\times {\mathrm{16871}}^1$

素因数の和:16962

約数の個数: 16

約数和(自身を含む): 34013952

約数和(自身を除く): 13009557

約数列:

[1, 3, 5, 15, 83, 249, 415, 1245, 16871, 50613, 84355, 253065, 1400293, 4200879, 7001465, 21004395]

約数ペア:

[(1, 21004395), (3, 7001465), (5, 4200879), (15, 1400293), (83, 253065), (249, 84355), (415, 50613), (1245, 16871)]