18765136

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{90217}}^1$

素因数の和:90238

約数の個数: 20

約数和(自身を含む): 39154612

約数和(自身を除く): 20389476

約数列:

[1, 2, 4, 8, 13, 16, 26, 52, 104, 208, 90217, 180434, 360868, 721736, 1172821, 1443472, 2345642, 4691284, 9382568, 18765136]

約数ペア:

[(1, 18765136), (2, 9382568), (4, 4691284), (8, 2345642), (13, 1443472), (16, 1172821), (26, 721736), (52, 360868), (104, 180434), (208, 90217)]