21254865

素因数分解:

$3^1\times 5^1\times {\mathrm{137}}^1\times {\mathrm{10343}}^1$

素因数の和:10488

約数の個数: 16

約数和(自身を含む): 34259328

約数和(自身を除く): 13004463

約数列:

[1, 3, 5, 15, 137, 411, 685, 2055, 10343, 31029, 51715, 155145, 1416991, 4250973, 7084955, 21254865]

約数ペア:

[(1, 21254865), (3, 7084955), (5, 4250973), (15, 1416991), (137, 155145), (411, 51715), (685, 31029), (2055, 10343)]