17280625

素因数分解:

$5^4\times {\mathrm{43}}^1\times {\mathrm{643}}^1$

素因数の和:706

約数の個数: 20

約数和(自身を含む): 22130416

約数和(自身を除く): 4849791

約数列:

[1, 5, 25, 43, 125, 215, 625, 643, 1075, 3215, 5375, 16075, 26875, 27649, 80375, 138245, 401875, 691225, 3456125, 17280625]

約数ペア:

[(1, 17280625), (5, 3456125), (25, 691225), (43, 401875), (125, 138245), (215, 80375), (625, 27649), (643, 26875), (1075, 16075), (3215, 5375)]