8020400

素因数分解:

$2^4\times 5^2\times {\mathrm{20051}}^1$

素因数の和:20069

約数の個数: 30

約数和(自身を含む): 19269972

約数和(自身を除く): 11249572

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 20051, 40102, 80204, 100255, 160408, 200510, 320816, 401020, 501275, 802040, 1002550, 1604080, 2005100, 4010200, 8020400]

約数ペア:

[(1, 8020400), (2, 4010200), (4, 2005100), (5, 1604080), (8, 1002550), (10, 802040), (16, 501275), (20, 401020), (25, 320816), (40, 200510), (50, 160408), (80, 100255), (100, 80204), (200, 40102), (400, 20051)]