20512157920

素因数分解:

$2^5\times 5^1\times {\mathrm{3229}}^1\times {\mathrm{39703}}^1$

素因数の和:42947

約数の個数: 48

約数和(自身を含む): 48476201760

約数和(自身を除く): 27964043840

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 3229, 6458, 12916, 16145, 25832, 32290, 39703, 51664, 64580, 79406, 103328, 129160, 158812, 198515, 258320, 317624, 397030, 516640, 635248, 794060, 1270496, 1588120, 3176240, 6352480, 128200987, 256401974, 512803948, 641004935, 1025607896, 1282009870, 2051215792, 2564019740, 4102431584, 5128039480, 10256078960, 20512157920]

約数ペア:

[(1, 20512157920), (2, 10256078960), (4, 5128039480), (5, 4102431584), (8, 2564019740), (10, 2051215792), (16, 1282009870), (20, 1025607896), (32, 641004935), (40, 512803948), (80, 256401974), (160, 128200987), (3229, 6352480), (6458, 3176240), (12916, 1588120), (16145, 1270496), (25832, 794060), (32290, 635248), (39703, 516640), (51664, 397030), (64580, 317624), (79406, 258320), (103328, 198515), (129160, 158812)]