1388421

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{281}}^1$

素因数の和:354

約数の個数: 20

約数和(自身を含む): 2115564

約数和(自身を除く): 727143

約数列:

[1, 3, 9, 27, 61, 81, 183, 281, 549, 843, 1647, 2529, 4941, 7587, 17141, 22761, 51423, 154269, 462807, 1388421]

約数ペア:

[(1, 1388421), (3, 462807), (9, 154269), (27, 51423), (61, 22761), (81, 17141), (183, 7587), (281, 4941), (549, 2529), (843, 1647)]