21816609

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{131}}^1\times {\mathrm{1291}}^1$

素因数の和:1468

約数の個数: 16

約数和(自身を含む): 30015744

約数和(自身を除く): 8199135

約数列:

[1, 3, 43, 129, 131, 393, 1291, 3873, 5633, 16899, 55513, 166539, 169121, 507363, 7272203, 21816609]

約数ペア:

[(1, 21816609), (3, 7272203), (43, 507363), (129, 169121), (131, 166539), (393, 55513), (1291, 16899), (3873, 5633)]