18920275

素因数分解:

$5^2\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{643}}^1$

素因数の和:771

約数の個数: 24

約数和(自身を含む): 25873344

約数和(自身を除く): 6953069

約数列:

[1, 5, 11, 25, 55, 107, 275, 535, 643, 1177, 2675, 3215, 5885, 7073, 16075, 29425, 35365, 68801, 176825, 344005, 756811, 1720025, 3784055, 18920275]

約数ペア:

[(1, 18920275), (5, 3784055), (11, 1720025), (25, 756811), (55, 344005), (107, 176825), (275, 68801), (535, 35365), (643, 29425), (1177, 16075), (2675, 7073), (3215, 5885)]