21254031

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{239}}^1\times {\mathrm{241}}^1$

素因数の和:527

約数の個数: 24

約数和(自身を含む): 31711680

約数和(自身を除く): 10457649

約数列:

[1, 3, 9, 41, 123, 239, 241, 369, 717, 723, 2151, 2169, 9799, 9881, 29397, 29643, 57599, 88191, 88929, 172797, 518391, 2361559, 7084677, 21254031]

約数ペア:

[(1, 21254031), (3, 7084677), (9, 2361559), (41, 518391), (123, 172797), (239, 88929), (241, 88191), (369, 57599), (717, 29643), (723, 29397), (2151, 9881), (2169, 9799)]