21015393

素因数分解:

$3^1\times 7^1\times {\mathrm{809}}^1\times {\mathrm{1237}}^1$

素因数の和:2056

約数の個数: 16

約数和(自身を含む): 32088960

約数和(自身を除く): 11073567

約数列:

[1, 3, 7, 21, 809, 1237, 2427, 3711, 5663, 8659, 16989, 25977, 1000733, 3002199, 7005131, 21015393]

約数ペア:

[(1, 21015393), (3, 7005131), (7, 3002199), (21, 1000733), (809, 25977), (1237, 16989), (2427, 8659), (3711, 5663)]