20990550

素因数分解:

$2^1\times 3^1\times 5^2\times 7^1\times {\mathrm{19991}}^1$

素因数の和:20013

約数の個数: 48

約数和(自身を含む): 59496192

約数和(自身を除く): 38505642

約数列:

[1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 25, 30, 35, 42, 50, 70, 75, 105, 150, 175, 210, 350, 525, 1050, 19991, 39982, 59973, 99955, 119946, 139937, 199910, 279874, 299865, 419811, 499775, 599730, 699685, 839622, 999550, 1399370, 1499325, 2099055, 2998650, 3498425, 4198110, 6996850, 10495275, 20990550]

約数ペア:

[(1, 20990550), (2, 10495275), (3, 6996850), (5, 4198110), (6, 3498425), (7, 2998650), (10, 2099055), (14, 1499325), (15, 1399370), (21, 999550), (25, 839622), (30, 699685), (35, 599730), (42, 499775), (50, 419811), (70, 299865), (75, 279874), (105, 199910), (150, 139937), (175, 119946), (210, 99955), (350, 59973), (525, 39982), (1050, 19991)]