21989715

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{133271}}^1$

素因数の和:133290

約数の個数: 16

約数和(自身を含む): 38382336

約数和(自身を除く): 16392621

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 133271, 399813, 666355, 1465981, 1999065, 4397943, 7329905, 21989715]

約数ペア:

[(1, 21989715), (3, 7329905), (5, 4397943), (11, 1999065), (15, 1465981), (33, 666355), (55, 399813), (165, 133271)]