20217988

素因数分解:

$2^2\times 7^2\times {\mathrm{29}}^1\times {\mathrm{3557}}^1$

素因数の和:3604

約数の個数: 36

約数和(自身を含む): 42589260

約数和(自身を除く): 22371272

約数列:

[1, 2, 4, 7, 14, 28, 29, 49, 58, 98, 116, 196, 203, 406, 812, 1421, 2842, 3557, 5684, 7114, 14228, 24899, 49798, 99596, 103153, 174293, 206306, 348586, 412612, 697172, 722071, 1444142, 2888284, 5054497, 10108994, 20217988]

約数ペア:

[(1, 20217988), (2, 10108994), (4, 5054497), (7, 2888284), (14, 1444142), (28, 722071), (29, 697172), (49, 412612), (58, 348586), (98, 206306), (116, 174293), (196, 103153), (203, 99596), (406, 49798), (812, 24899), (1421, 14228), (2842, 7114), (3557, 5684)]