20516375

素因数分解:

$5^3\times {\mathrm{11}}^1\times {\mathrm{43}}^1\times {\mathrm{347}}^1$

素因数の和:416

約数の個数: 32

約数和(自身を含む): 28664064

約数和(自身を除く): 8147689

約数列:

[1, 5, 11, 25, 43, 55, 125, 215, 275, 347, 473, 1075, 1375, 1735, 2365, 3817, 5375, 8675, 11825, 14921, 19085, 43375, 59125, 74605, 95425, 164131, 373025, 477125, 820655, 1865125, 4103275, 20516375]

約数ペア:

[(1, 20516375), (5, 4103275), (11, 1865125), (25, 820655), (43, 477125), (55, 373025), (125, 164131), (215, 95425), (275, 74605), (347, 59125), (473, 43375), (1075, 19085), (1375, 14921), (1735, 11825), (2365, 8675), (3817, 5375)]