20121911860

素因数分解:

$2^2\times 5^1\times {\mathrm{1987}}^1\times {\mathrm{506339}}^1$

素因数の和:508335

約数の個数: 24

約数和(自身を含む): 42277364640

約数和(自身を除く): 22155452780

約数列:

[1, 2, 4, 5, 10, 20, 1987, 3974, 7948, 9935, 19870, 39740, 506339, 1012678, 2025356, 2531695, 5063390, 10126780, 1006095593, 2012191186, 4024382372, 5030477965, 10060955930, 20121911860]

約数ペア:

[(1, 20121911860), (2, 10060955930), (4, 5030477965), (5, 4024382372), (10, 2012191186), (20, 1006095593), (1987, 10126780), (3974, 5063390), (7948, 2531695), (9935, 2025356), (19870, 1012678), (39740, 506339)]