21789243

素因数分解:

$3^4\times 7^1\times {\mathrm{83}}^1\times {\mathrm{463}}^1$

素因数の和:565

約数の個数: 40

約数和(自身を含む): 37728768

約数和(自身を除く): 15939525

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 83, 189, 249, 463, 567, 581, 747, 1389, 1743, 2241, 3241, 4167, 5229, 6723, 9723, 12501, 15687, 29169, 37503, 38429, 47061, 87507, 115287, 262521, 269003, 345861, 807009, 1037583, 2421027, 3112749, 7263081, 21789243]

約数ペア:

[(1, 21789243), (3, 7263081), (7, 3112749), (9, 2421027), (21, 1037583), (27, 807009), (63, 345861), (81, 269003), (83, 262521), (189, 115287), (249, 87507), (463, 47061), (567, 38429), (581, 37503), (747, 29169), (1389, 15687), (1743, 12501), (2241, 9723), (3241, 6723), (4167, 5229)]