138978340

素因数分解:

$2^2\times 5^1\times {\mathrm{1627}}^1\times {\mathrm{4271}}^1$

素因数の和:5907

約数の個数: 24

約数和(自身を含む): 292102272

約数和(自身を除く): 153123932

約数列:

[1, 2, 4, 5, 10, 20, 1627, 3254, 4271, 6508, 8135, 8542, 16270, 17084, 21355, 32540, 42710, 85420, 6948917, 13897834, 27795668, 34744585, 69489170, 138978340]

約数ペア:

[(1, 138978340), (2, 69489170), (4, 34744585), (5, 27795668), (10, 13897834), (20, 6948917), (1627, 85420), (3254, 42710), (4271, 32540), (6508, 21355), (8135, 17084), (8542, 16270)]