21493165

素因数分解:

$5^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1\times {\mathrm{349}}^1$

素因数の和:576

約数の個数: 16

約数和(自身を含む): 26334000

約数和(自身を除く): 4840835

約数列:

[1, 5, 109, 113, 349, 545, 565, 1745, 12317, 38041, 39437, 61585, 190205, 197185, 4298633, 21493165]

約数ペア:

[(1, 21493165), (5, 4298633), (109, 197185), (113, 190205), (349, 61585), (545, 39437), (565, 38041), (1745, 12317)]