1981820

素因数分解:

$2^2\times 5^1\times {\mathrm{197}}^1\times {\mathrm{503}}^1$

素因数の和:709

約数の個数: 24

約数和(自身を含む): 4191264

約数和(自身を除く): 2209444

約数列:

[1, 2, 4, 5, 10, 20, 197, 394, 503, 788, 985, 1006, 1970, 2012, 2515, 3940, 5030, 10060, 99091, 198182, 396364, 495455, 990910, 1981820]

約数ペア:

[(1, 1981820), (2, 990910), (4, 495455), (5, 396364), (10, 198182), (20, 99091), (197, 10060), (394, 5030), (503, 3940), (788, 2515), (985, 2012), (1006, 1970)]