19942209

素因数分解:

$3^2\times 7^1\times {\mathrm{349}}^1\times {\mathrm{907}}^1$

素因数の和:1269

約数の個数: 24

約数和(自身を含む): 33051200

約数和(自身を除く): 13108991

約数列:

[1, 3, 7, 9, 21, 63, 349, 907, 1047, 2443, 2721, 3141, 6349, 7329, 8163, 19047, 21987, 57141, 316543, 949629, 2215801, 2848887, 6647403, 19942209]

約数ペア:

[(1, 19942209), (3, 6647403), (7, 2848887), (9, 2215801), (21, 949629), (63, 316543), (349, 57141), (907, 21987), (1047, 19047), (2443, 8163), (2721, 7329), (3141, 6349)]