21027915

素因数分解:

$3^2\times 5^1\times {\mathrm{503}}^1\times {\mathrm{929}}^1$

素因数の和:1443

約数の個数: 24

約数和(自身を含む): 36560160

約数和(自身を除く): 15532245

約数列:

[1, 3, 5, 9, 15, 45, 503, 929, 1509, 2515, 2787, 4527, 4645, 7545, 8361, 13935, 22635, 41805, 467287, 1401861, 2336435, 4205583, 7009305, 21027915]

約数ペア:

[(1, 21027915), (3, 7009305), (5, 4205583), (9, 2336435), (15, 1401861), (45, 467287), (503, 41805), (929, 22635), (1509, 13935), (2515, 8361), (2787, 7545), (4527, 4645)]