20561655

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{107}}^1\times {\mathrm{557}}^1$

素因数の和:695

約数の個数: 32

約数和(自身を含む): 34712064

約数和(自身を除く): 14150409

約数列:

[1, 3, 5, 15, 23, 69, 107, 115, 321, 345, 535, 557, 1605, 1671, 2461, 2785, 7383, 8355, 12305, 12811, 36915, 38433, 59599, 64055, 178797, 192165, 297995, 893985, 1370777, 4112331, 6853885, 20561655]

約数ペア:

[(1, 20561655), (3, 6853885), (5, 4112331), (15, 1370777), (23, 893985), (69, 297995), (107, 192165), (115, 178797), (321, 64055), (345, 59599), (535, 38433), (557, 36915), (1605, 12811), (1671, 12305), (2461, 8355), (2785, 7383)]