217557939

素因数分解:

$3^1\times {\mathrm{101}}^1\times {\mathrm{103}}^1\times {\mathrm{6971}}^1$

素因数の和:7178

約数の個数: 16

約数和(自身を含む): 295835904

約数和(自身を除く): 78277965

約数列:

[1, 3, 101, 103, 303, 309, 6971, 10403, 20913, 31209, 704071, 718013, 2112213, 2154039, 72519313, 217557939]

約数ペア:

[(1, 217557939), (3, 72519313), (101, 2154039), (103, 2112213), (303, 718013), (309, 704071), (6971, 31209), (10403, 20913)]