21182715

素因数分解:

$3^4\times 5^1\times {\mathrm{193}}^1\times {\mathrm{271}}^1$

素因数の和:481

約数の個数: 40

約数和(自身を含む): 38309568

約数和(自身を除く): 17126853

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 193, 271, 405, 579, 813, 965, 1355, 1737, 2439, 2895, 4065, 5211, 7317, 8685, 12195, 15633, 21951, 26055, 36585, 52303, 78165, 109755, 156909, 261515, 470727, 784545, 1412181, 2353635, 4236543, 7060905, 21182715]

約数ペア:

[(1, 21182715), (3, 7060905), (5, 4236543), (9, 2353635), (15, 1412181), (27, 784545), (45, 470727), (81, 261515), (135, 156909), (193, 109755), (271, 78165), (405, 52303), (579, 36585), (813, 26055), (965, 21951), (1355, 15633), (1737, 12195), (2439, 8685), (2895, 7317), (4065, 5211)]