21530486871

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{400247}}^1$

素因数の和:400435

約数の個数: 24

約数和(自身を含む): 32051859840

約数和(自身を除く): 10521372969

約数列:

[1, 3, 9, 43, 129, 139, 387, 417, 1251, 5977, 17931, 53793, 400247, 1200741, 3602223, 17210621, 51631863, 55634333, 154895589, 166902999, 500708997, 2392276319, 7176828957, 21530486871]

約数ペア:

[(1, 21530486871), (3, 7176828957), (9, 2392276319), (43, 500708997), (129, 166902999), (139, 154895589), (387, 55634333), (417, 51631863), (1251, 17210621), (5977, 3602223), (17931, 1200741), (53793, 400247)]