21349377

素因数分解:

$3^2\times 7^1\times {\mathrm{349}}^1\times {\mathrm{971}}^1$

素因数の和:1333

約数の個数: 24

約数和(自身を含む): 35380800

約数和(自身を除く): 14031423

約数列:

[1, 3, 7, 9, 21, 63, 349, 971, 1047, 2443, 2913, 3141, 6797, 7329, 8739, 20391, 21987, 61173, 338879, 1016637, 2372153, 3049911, 7116459, 21349377]

約数ペア:

[(1, 21349377), (3, 7116459), (7, 3049911), (9, 2372153), (21, 1016637), (63, 338879), (349, 61173), (971, 21987), (1047, 20391), (2443, 8739), (2913, 7329), (3141, 6797)]