21328845

素因数分解:

$3^1\times 5^1\times {\mathrm{97}}^1\times {\mathrm{107}}^1\times {\mathrm{137}}^1$

素因数の和:349

約数の個数: 32

約数和(自身を含む): 35054208

約数和(自身を除く): 13725363

約数列:

[1, 3, 5, 15, 97, 107, 137, 291, 321, 411, 485, 535, 685, 1455, 1605, 2055, 10379, 13289, 14659, 31137, 39867, 43977, 51895, 66445, 73295, 155685, 199335, 219885, 1421923, 4265769, 7109615, 21328845]

約数ペア:

[(1, 21328845), (3, 7109615), (5, 4265769), (15, 1421923), (97, 219885), (107, 199335), (137, 155685), (291, 73295), (321, 66445), (411, 51895), (485, 43977), (535, 39867), (685, 31137), (1455, 14659), (1605, 13289), (2055, 10379)]