20391507

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4127}}^1$

素因数の和:4200

約数の個数: 20

約数和(自身を含む): 30968256

約数和(自身を除く): 10576749

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4127, 4941, 12381, 37143, 111429, 251747, 334287, 755241, 2265723, 6797169, 20391507]

約数ペア:

[(1, 20391507), (3, 6797169), (9, 2265723), (27, 755241), (61, 334287), (81, 251747), (183, 111429), (549, 37143), (1647, 12381), (4127, 4941)]