20563205

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{53}}^1\times {\mathrm{127}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 27869184

約数和(自身を除く): 7305979

約数列:

[1, 5, 13, 47, 53, 65, 127, 235, 265, 611, 635, 689, 1651, 2491, 3055, 3445, 5969, 6731, 8255, 12455, 29845, 32383, 33655, 77597, 87503, 161915, 316357, 387985, 437515, 1581785, 4112641, 20563205]

約数ペア:

[(1, 20563205), (5, 4112641), (13, 1581785), (47, 437515), (53, 387985), (65, 316357), (127, 161915), (235, 87503), (265, 77597), (611, 33655), (635, 32383), (689, 29845), (1651, 12455), (2491, 8255), (3055, 6731), (3445, 5969)]