21511329

素因数分解:

$3^1\times 7^1\times {\mathrm{137}}^1\times {\mathrm{7477}}^1$

素因数の和:7624

約数の個数: 16

約数和(自身を含む): 33022848

約数和(自身を除く): 11511519

約数列:

[1, 3, 7, 21, 137, 411, 959, 2877, 7477, 22431, 52339, 157017, 1024349, 3073047, 7170443, 21511329]

約数ペア:

[(1, 21511329), (3, 7170443), (7, 3073047), (21, 1024349), (137, 157017), (411, 52339), (959, 22431), (2877, 7477)]