20219997

素因数分解:

$3^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{2053}}^1$

素因数の和:2137

約数の個数: 24

約数和(自身を含む): 31845216

約数和(自身を除く): 11625219

約数列:

[1, 3, 7, 21, 49, 67, 147, 201, 469, 1407, 2053, 3283, 6159, 9849, 14371, 43113, 100597, 137551, 301791, 412653, 962857, 2888571, 6739999, 20219997]

約数ペア:

[(1, 20219997), (3, 6739999), (7, 2888571), (21, 962857), (49, 412653), (67, 301791), (147, 137551), (201, 100597), (469, 43113), (1407, 14371), (2053, 9849), (3283, 6159)]