21508587

素因数分解:

$3^2\times {\mathrm{17}}^1\times {\mathrm{257}}^1\times {\mathrm{547}}^1$

素因数の和:827

約数の個数: 24

約数和(自身を含む): 33083856

約数和(自身を除く): 11575269

約数列:

[1, 3, 9, 17, 51, 153, 257, 547, 771, 1641, 2313, 4369, 4923, 9299, 13107, 27897, 39321, 83691, 140579, 421737, 1265211, 2389843, 7169529, 21508587]

約数ペア:

[(1, 21508587), (3, 7169529), (9, 2389843), (17, 1265211), (51, 421737), (153, 140579), (257, 83691), (547, 39321), (771, 27897), (1641, 13107), (2313, 9299), (4369, 4923)]