18423707920

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1169017}}^1$

素因数の和:1169227

約数の個数: 40

約数和(自身を含む): 43052594904

約数和(自身を除く): 24628886984

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1970, 3152, 3940, 7880, 15760, 1169017, 2338034, 4676068, 5845085, 9352136, 11690170, 18704272, 23380340, 46760680, 93521360, 230296349, 460592698, 921185396, 1151481745, 1842370792, 2302963490, 3684741584, 4605926980, 9211853960, 18423707920]

約数ペア:

[(1, 18423707920), (2, 9211853960), (4, 4605926980), (5, 3684741584), (8, 2302963490), (10, 1842370792), (16, 1151481745), (20, 921185396), (40, 460592698), (80, 230296349), (197, 93521360), (394, 46760680), (788, 23380340), (985, 18704272), (1576, 11690170), (1970, 9352136), (3152, 5845085), (3940, 4676068), (7880, 2338034), (15760, 1169017)]