20781212

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{6359}}^1$

素因数の和:6425

約数の個数: 24

約数和(自身を含む): 39177600

約数和(自身を除く): 18396388

約数列:

[1, 2, 4, 19, 38, 43, 76, 86, 172, 817, 1634, 3268, 6359, 12718, 25436, 120821, 241642, 273437, 483284, 546874, 1093748, 5195303, 10390606, 20781212]

約数ペア:

[(1, 20781212), (2, 10390606), (4, 5195303), (19, 1093748), (38, 546874), (43, 483284), (76, 273437), (86, 241642), (172, 120821), (817, 25436), (1634, 12718), (3268, 6359)]