81235940

素因数分解:

$2^2\times 5^1\times {\mathrm{163}}^1\times {\mathrm{24919}}^1$

素因数の和:25091

約数の個数: 24

約数和(自身を含む): 171648960

約数和(自身を除く): 90413020

約数列:

[1, 2, 4, 5, 10, 20, 163, 326, 652, 815, 1630, 3260, 24919, 49838, 99676, 124595, 249190, 498380, 4061797, 8123594, 16247188, 20308985, 40617970, 81235940]

約数ペア:

[(1, 81235940), (2, 40617970), (4, 20308985), (5, 16247188), (10, 8123594), (20, 4061797), (163, 498380), (326, 249190), (652, 124595), (815, 99676), (1630, 49838), (3260, 24919)]