20985380

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{80713}}^1$

素因数の和:80735

約数の個数: 24

約数和(自身を含む): 47459832

約数和(自身を除く): 26474452

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 80713, 161426, 322852, 403565, 807130, 1049269, 1614260, 2098538, 4197076, 5246345, 10492690, 20985380]

約数ペア:

[(1, 20985380), (2, 10492690), (4, 5246345), (5, 4197076), (10, 2098538), (13, 1614260), (20, 1049269), (26, 807130), (52, 403565), (65, 322852), (130, 161426), (260, 80713)]