21739505

素因数分解:

$5^1\times {\mathrm{109}}^1\times {\mathrm{113}}^1\times {\mathrm{353}}^1$

素因数の和:580

約数の個数: 16

約数和(自身を含む): 26634960

約数和(自身を除く): 4895455

約数列:

[1, 5, 109, 113, 353, 545, 565, 1765, 12317, 38477, 39889, 61585, 192385, 199445, 4347901, 21739505]

約数ペア:

[(1, 21739505), (5, 4347901), (109, 199445), (113, 192385), (353, 61585), (545, 39889), (565, 38477), (1765, 12317)]