21290241

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53359}}^1$

素因数の和:53388

約数の個数: 16

約数和(自身を含む): 34150400

約数和(自身を除く): 12860159

約数列:

[1, 3, 7, 19, 21, 57, 133, 399, 53359, 160077, 373513, 1013821, 1120539, 3041463, 7096747, 21290241]

約数ペア:

[(1, 21290241), (3, 7096747), (7, 3041463), (19, 1120539), (21, 1013821), (57, 373513), (133, 160077), (399, 53359)]