21025395

素因数分解:

$3^2\times 5^1\times {\mathrm{659}}^1\times {\mathrm{709}}^1$

素因数の和:1379

約数の個数: 24

約数和(自身を含む): 36550800

約数和(自身を除く): 15525405

約数列:

[1, 3, 5, 9, 15, 45, 659, 709, 1977, 2127, 3295, 3545, 5931, 6381, 9885, 10635, 29655, 31905, 467231, 1401693, 2336155, 4205079, 7008465, 21025395]

約数ペア:

[(1, 21025395), (3, 7008465), (5, 4205079), (9, 2336155), (15, 1401693), (45, 467231), (659, 31905), (709, 29655), (1977, 10635), (2127, 9885), (3295, 6381), (3545, 5931)]