28878155

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{7901}}^1$

素因数の和:7966

約数の個数: 16

約数和(自身を含む): 37550304

約数和(自身を除く): 8672149

約数列:

[1, 5, 17, 43, 85, 215, 731, 3655, 7901, 39505, 134317, 339743, 671585, 1698715, 5775631, 28878155]

約数ペア:

[(1, 28878155), (5, 5775631), (17, 1698715), (43, 671585), (85, 339743), (215, 134317), (731, 39505), (3655, 7901)]