18778040

素因数分解:

$2^3\times 5^1\times {\mathrm{197}}^1\times {\mathrm{2383}}^1$

素因数の和:2591

約数の個数: 32

約数和(自身を含む): 42482880

約数和(自身を除く): 23704840

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 197, 394, 788, 985, 1576, 1970, 2383, 3940, 4766, 7880, 9532, 11915, 19064, 23830, 47660, 95320, 469451, 938902, 1877804, 2347255, 3755608, 4694510, 9389020, 18778040]

約数ペア:

[(1, 18778040), (2, 9389020), (4, 4694510), (5, 3755608), (8, 2347255), (10, 1877804), (20, 938902), (40, 469451), (197, 95320), (394, 47660), (788, 23830), (985, 19064), (1576, 11915), (1970, 9532), (2383, 7880), (3940, 4766)]