21191080

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{27883}}^1$

素因数の和:27913

約数の個数: 32

約数和(自身を含む): 50191200

約数和(自身を除く): 29000120

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 38, 40, 76, 95, 152, 190, 380, 760, 27883, 55766, 111532, 139415, 223064, 278830, 529777, 557660, 1059554, 1115320, 2119108, 2648885, 4238216, 5297770, 10595540, 21191080]

約数ペア:

[(1, 21191080), (2, 10595540), (4, 5297770), (5, 4238216), (8, 2648885), (10, 2119108), (19, 1115320), (20, 1059554), (38, 557660), (40, 529777), (76, 278830), (95, 223064), (152, 139415), (190, 111532), (380, 55766), (760, 27883)]