20205915

素因数分解:

$3^1\times 5^1\times {\mathrm{43}}^1\times {\mathrm{31327}}^1$

素因数の和:31378

約数の個数: 16

約数和(自身を含む): 33082368

約数和(自身を除く): 12876453

約数列:

[1, 3, 5, 15, 43, 129, 215, 645, 31327, 93981, 156635, 469905, 1347061, 4041183, 6735305, 20205915]

約数ペア:

[(1, 20205915), (3, 6735305), (5, 4041183), (15, 1347061), (43, 469905), (129, 156635), (215, 93981), (645, 31327)]