21429945

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{109}}^1\times {\mathrm{257}}^1$

素因数の和:394

約数の個数: 48

約数和(自身を含む): 39845520

約数和(自身を除く): 18415575

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 109, 153, 255, 257, 327, 545, 765, 771, 981, 1285, 1635, 1853, 2313, 3855, 4369, 4905, 5559, 9265, 11565, 13107, 16677, 21845, 27795, 28013, 39321, 65535, 83385, 84039, 140065, 196605, 252117, 420195, 476221, 1260585, 1428663, 2381105, 4285989, 7143315, 21429945]

約数ペア:

[(1, 21429945), (3, 7143315), (5, 4285989), (9, 2381105), (15, 1428663), (17, 1260585), (45, 476221), (51, 420195), (85, 252117), (109, 196605), (153, 140065), (255, 84039), (257, 83385), (327, 65535), (545, 39321), (765, 28013), (771, 27795), (981, 21845), (1285, 16677), (1635, 13107), (1853, 11565), (2313, 9265), (3855, 5559), (4369, 4905)]