20931057

素因数分解:

$3^2\times 7^1\times {\mathrm{457}}^1\times {\mathrm{727}}^1$

素因数の和:1197

約数の個数: 24

約数和(自身を含む): 34676096

約数和(自身を除く): 13745039

約数列:

[1, 3, 7, 9, 21, 63, 457, 727, 1371, 2181, 3199, 4113, 5089, 6543, 9597, 15267, 28791, 45801, 332239, 996717, 2325673, 2990151, 6977019, 20931057]

約数ペア:

[(1, 20931057), (3, 6977019), (7, 2990151), (9, 2325673), (21, 996717), (63, 332239), (457, 45801), (727, 28791), (1371, 15267), (2181, 9597), (3199, 6543), (4113, 5089)]