21987867

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{569}}^1\times {\mathrm{1171}}^1$

素因数の和:1754

約数の個数: 16

約数和(自身を含む): 32065920

約数和(自身を除く): 10078053

約数列:

[1, 3, 11, 33, 569, 1171, 1707, 3513, 6259, 12881, 18777, 38643, 666299, 1998897, 7329289, 21987867]

約数ペア:

[(1, 21987867), (3, 7329289), (11, 1998897), (33, 666299), (569, 38643), (1171, 18777), (1707, 12881), (3513, 6259)]