21054131

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{251}}^1\times {\mathrm{521}}^1$

素因数の和:802

約数の個数: 16

約数和(自身を含む): 25256448

約数和(自身を除く): 4202317

約数列:

[1, 7, 23, 161, 251, 521, 1757, 3647, 5773, 11983, 40411, 83881, 130771, 915397, 3007733, 21054131]

約数ペア:

[(1, 21054131), (7, 3007733), (23, 915397), (161, 130771), (251, 83881), (521, 40411), (1757, 11983), (3647, 5773)]