20794384

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{257}}^1\times {\mathrm{389}}^1$

素因数の和:667

約数の個数: 40

約数和(自身を含む): 43669080

約数和(自身を除く): 22874696

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 257, 389, 514, 778, 1028, 1556, 2056, 3112, 3341, 4112, 5057, 6224, 6682, 10114, 13364, 20228, 26728, 40456, 53456, 80912, 99973, 199946, 399892, 799784, 1299649, 1599568, 2599298, 5198596, 10397192, 20794384]

約数ペア:

[(1, 20794384), (2, 10397192), (4, 5198596), (8, 2599298), (13, 1599568), (16, 1299649), (26, 799784), (52, 399892), (104, 199946), (208, 99973), (257, 80912), (389, 53456), (514, 40456), (778, 26728), (1028, 20228), (1556, 13364), (2056, 10114), (3112, 6682), (3341, 6224), (4112, 5057)]