20217640

素因数分解:

$2^3\times 5^1\times {\mathrm{29}}^2\times {\mathrm{601}}^1$

素因数の和:670

約数の個数: 48

約数和(自身を含む): 47190780

約数和(自身を除く): 26973140

約数列:

[1, 2, 4, 5, 8, 10, 20, 29, 40, 58, 116, 145, 232, 290, 580, 601, 841, 1160, 1202, 1682, 2404, 3005, 3364, 4205, 4808, 6010, 6728, 8410, 12020, 16820, 17429, 24040, 33640, 34858, 69716, 87145, 139432, 174290, 348580, 505441, 697160, 1010882, 2021764, 2527205, 4043528, 5054410, 10108820, 20217640]

約数ペア:

[(1, 20217640), (2, 10108820), (4, 5054410), (5, 4043528), (8, 2527205), (10, 2021764), (20, 1010882), (29, 697160), (40, 505441), (58, 348580), (116, 174290), (145, 139432), (232, 87145), (290, 69716), (580, 34858), (601, 33640), (841, 24040), (1160, 17429), (1202, 16820), (1682, 12020), (2404, 8410), (3005, 6728), (3364, 6010), (4205, 4808)]