18902005

素因数分解:

$5^1\times {\mathrm{37}}^1\times {\mathrm{83}}^1\times {\mathrm{1231}}^1$

素因数の和:1356

約数の個数: 16

約数和(自身を含む): 23595264

約数和(自身を除く): 4693259

約数列:

[1, 5, 37, 83, 185, 415, 1231, 3071, 6155, 15355, 45547, 102173, 227735, 510865, 3780401, 18902005]

約数ペア:

[(1, 18902005), (5, 3780401), (37, 510865), (83, 227735), (185, 102173), (415, 45547), (1231, 15355), (3071, 6155)]