21184221

素因数分解:

$3^1\times {\mathrm{19}}^1\times {\mathrm{419}}^1\times {\mathrm{887}}^1$

素因数の和:1328

約数の個数: 16

約数和(自身を含む): 29836800

約数和(自身を除く): 8652579

約数列:

[1, 3, 19, 57, 419, 887, 1257, 2661, 7961, 16853, 23883, 50559, 371653, 1114959, 7061407, 21184221]

約数ペア:

[(1, 21184221), (3, 7061407), (19, 1114959), (57, 371653), (419, 50559), (887, 23883), (1257, 16853), (2661, 7961)]