21278049405

素因数分解:

$3^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{83443331}}^1$

素因数の和:83443356

約数の個数: 16

約数和(自身を含む): 36047519424

約数和(自身を除く): 14769470019

約数列:

[1, 3, 5, 15, 17, 51, 85, 255, 83443331, 250329993, 417216655, 1251649965, 1418536627, 4255609881, 7092683135, 21278049405]

約数ペア:

[(1, 21278049405), (3, 7092683135), (5, 4255609881), (15, 1418536627), (17, 1251649965), (51, 417216655), (85, 250329993), (255, 83443331)]