42720021

素因数分解:

$3^3\times {\mathrm{673}}^1\times {\mathrm{2351}}^1$

素因数の和:3033

約数の個数: 16

約数和(自身を含む): 63409920

約数和(自身を除く): 20689899

約数列:

[1, 3, 9, 27, 673, 2019, 2351, 6057, 7053, 18171, 21159, 63477, 1582223, 4746669, 14240007, 42720021]

約数ペア:

[(1, 42720021), (3, 14240007), (9, 4746669), (27, 1582223), (673, 63477), (2019, 21159), (2351, 18171), (6057, 7053)]