20380275

素因数分解:

$3^3\times 5^2\times {\mathrm{109}}^1\times {\mathrm{277}}^1$

素因数の和:405

約数の個数: 48

約数和(自身を含む): 37919200

約数和(自身を除く): 17538925

約数列:

[1, 3, 5, 9, 15, 25, 27, 45, 75, 109, 135, 225, 277, 327, 545, 675, 831, 981, 1385, 1635, 2493, 2725, 2943, 4155, 4905, 6925, 7479, 8175, 12465, 14715, 20775, 24525, 30193, 37395, 62325, 73575, 90579, 150965, 186975, 271737, 452895, 754825, 815211, 1358685, 2264475, 4076055, 6793425, 20380275]

約数ペア:

[(1, 20380275), (3, 6793425), (5, 4076055), (9, 2264475), (15, 1358685), (25, 815211), (27, 754825), (45, 452895), (75, 271737), (109, 186975), (135, 150965), (225, 90579), (277, 73575), (327, 62325), (545, 37395), (675, 30193), (831, 24525), (981, 20775), (1385, 14715), (1635, 12465), (2493, 8175), (2725, 7479), (2943, 6925), (4155, 4905)]