81487295

素因数分解:

$5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{20921}}^1$

素因数の和:20986

約数の個数: 16

約数和(自身を含む): 105446880

約数和(自身を除く): 23959585

約数列:

[1, 5, 19, 41, 95, 205, 779, 3895, 20921, 104605, 397499, 857761, 1987495, 4288805, 16297459, 81487295]

約数ペア:

[(1, 81487295), (5, 16297459), (19, 4288805), (41, 1987495), (95, 857761), (205, 397499), (779, 104605), (3895, 20921)]