28748209

素因数分解:

$7^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{641}}^1$

素因数の和:840

約数の個数: 16

約数和(自身を含む): 33897600

約数和(自身を除く): 5149391

約数列:

[1, 7, 43, 149, 301, 641, 1043, 4487, 6407, 27563, 44849, 95509, 192941, 668563, 4106887, 28748209]

約数ペア:

[(1, 28748209), (7, 4106887), (43, 668563), (149, 192941), (301, 95509), (641, 44849), (1043, 27563), (4487, 6407)]