81951860

素因数分解:

$2^2\times 5^1\times {\mathrm{421}}^1\times {\mathrm{9733}}^1$

素因数の和:10163

約数の個数: 24

約数和(自身を含む): 172525416

約数和(自身を除く): 90573556

約数列:

[1, 2, 4, 5, 10, 20, 421, 842, 1684, 2105, 4210, 8420, 9733, 19466, 38932, 48665, 97330, 194660, 4097593, 8195186, 16390372, 20487965, 40975930, 81951860]

約数ペア:

[(1, 81951860), (2, 40975930), (4, 20487965), (5, 16390372), (10, 8195186), (20, 4097593), (421, 194660), (842, 97330), (1684, 48665), (2105, 38932), (4210, 19466), (8420, 9733)]