21356660

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{82141}}^1$

素因数の和:82163

約数の個数: 24

約数和(自身を含む): 48299496

約数和(自身を除く): 26942836

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 82141, 164282, 328564, 410705, 821410, 1067833, 1642820, 2135666, 4271332, 5339165, 10678330, 21356660]

約数ペア:

[(1, 21356660), (2, 10678330), (4, 5339165), (5, 4271332), (10, 2135666), (13, 1642820), (20, 1067833), (26, 821410), (52, 410705), (65, 328564), (130, 164282), (260, 82141)]