20356978

素因数分解:

$2^1\times {\mathrm{23}}^2\times {\mathrm{71}}^1\times {\mathrm{271}}^1$

素因数の和:390

約数の個数: 24

約数和(自身を含む): 32489856

約数和(自身を除く): 12132878

約数列:

[1, 2, 23, 46, 71, 142, 271, 529, 542, 1058, 1633, 3266, 6233, 12466, 19241, 37559, 38482, 75118, 143359, 286718, 442543, 885086, 10178489, 20356978]

約数ペア:

[(1, 20356978), (2, 10178489), (23, 885086), (46, 442543), (71, 286718), (142, 143359), (271, 75118), (529, 38482), (542, 37559), (1058, 19241), (1633, 12466), (3266, 6233)]