21040045

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{89}}^1\times {\mathrm{3637}}^1$

素因数の和:3744

約数の個数: 16

約数和(自身を含む): 27503280

約数和(自身を除く): 6463235

約数列:

[1, 5, 13, 65, 89, 445, 1157, 3637, 5785, 18185, 47281, 236405, 323693, 1618465, 4208009, 21040045]

約数ペア:

[(1, 21040045), (5, 4208009), (13, 1618465), (65, 323693), (89, 236405), (445, 47281), (1157, 18185), (3637, 5785)]