20657205

素因数分解:

$3^2\times 5^1\times {\mathrm{47}}^1\times {\mathrm{9767}}^1$

素因数の和:9825

約数の個数: 24

約数和(自身を含む): 36571392

約数和(自身を除く): 15914187

約数列:

[1, 3, 5, 9, 15, 45, 47, 141, 235, 423, 705, 2115, 9767, 29301, 48835, 87903, 146505, 439515, 459049, 1377147, 2295245, 4131441, 6885735, 20657205]

約数ペア:

[(1, 20657205), (3, 6885735), (5, 4131441), (9, 2295245), (15, 1377147), (45, 459049), (47, 439515), (141, 146505), (235, 87903), (423, 48835), (705, 29301), (2115, 9767)]