21023751

素因数分解:

$3^1\times 7^1\times {\mathrm{149}}^1\times {\mathrm{6719}}^1$

素因数の和:6878

約数の個数: 16

約数和(自身を含む): 32256000

約数和(自身を除く): 11232249

約数列:

[1, 3, 7, 21, 149, 447, 1043, 3129, 6719, 20157, 47033, 141099, 1001131, 3003393, 7007917, 21023751]

約数ペア:

[(1, 21023751), (3, 7007917), (7, 3003393), (21, 1001131), (149, 141099), (447, 47033), (1043, 20157), (3129, 6719)]