20931967

素因数分解:

$7^2\times {\mathrm{47}}^1\times {\mathrm{61}}^1\times {\mathrm{149}}^1$

素因数の和:271

約数の個数: 24

約数和(自身を含む): 25444800

約数和(自身を除く): 4512833

約数列:

[1, 7, 47, 49, 61, 149, 329, 427, 1043, 2303, 2867, 2989, 7003, 7301, 9089, 20069, 49021, 63623, 140483, 343147, 427183, 445361, 2990281, 20931967]

約数ペア:

[(1, 20931967), (7, 2990281), (47, 445361), (49, 427183), (61, 343147), (149, 140483), (329, 63623), (427, 49021), (1043, 20069), (2303, 9089), (2867, 7301), (2989, 7003)]