21541390

素因数分解:

$2^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{165703}}^1$

素因数の和:165723

約数の個数: 16

約数和(自身を含む): 41757408

約数和(自身を除く): 20216018

約数列:

[1, 2, 5, 10, 13, 26, 65, 130, 165703, 331406, 828515, 1657030, 2154139, 4308278, 10770695, 21541390]

約数ペア:

[(1, 21541390), (2, 10770695), (5, 4308278), (10, 2154139), (13, 1657030), (26, 828515), (65, 331406), (130, 165703)]