81470529

素因数分解:

$3^4\times 7^1\times {\mathrm{143687}}^1$

素因数の和:143706

約数の個数: 20

約数和(自身を含む): 139089984

約数和(自身を除く): 57619455

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 143687, 431061, 1005809, 1293183, 3017427, 3879549, 9052281, 11638647, 27156843, 81470529]

約数ペア:

[(1, 81470529), (3, 27156843), (7, 11638647), (9, 9052281), (21, 3879549), (27, 3017427), (63, 1293183), (81, 1005809), (189, 431061), (567, 143687)]