21140649

素因数分解:

$3^3\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1$

素因数の和:322

約数の個数: 32

約数和(自身を含む): 32524800

約数和(自身を除く): 11384151

約数列:

[1, 3, 9, 27, 43, 129, 131, 139, 387, 393, 417, 1161, 1179, 1251, 3537, 3753, 5633, 5977, 16899, 17931, 18209, 50697, 53793, 54627, 152091, 161379, 163881, 491643, 782987, 2348961, 7046883, 21140649]

約数ペア:

[(1, 21140649), (3, 7046883), (9, 2348961), (27, 782987), (43, 491643), (129, 163881), (131, 161379), (139, 152091), (387, 54627), (393, 53793), (417, 50697), (1161, 18209), (1179, 17931), (1251, 16899), (3537, 5977), (3753, 5633)]