21097179

素因数分解:

$3^4\times {\mathrm{181}}^1\times {\mathrm{1439}}^1$

素因数の和:1632

約数の個数: 20

約数和(自身を含む): 31711680

約数和(自身を除く): 10614501

約数列:

[1, 3, 9, 27, 81, 181, 543, 1439, 1629, 4317, 4887, 12951, 14661, 38853, 116559, 260459, 781377, 2344131, 7032393, 21097179]

約数ペア:

[(1, 21097179), (3, 7032393), (9, 2344131), (27, 781377), (81, 260459), (181, 116559), (543, 38853), (1439, 14661), (1629, 12951), (4317, 4887)]