128971521

素因数分解:

$3^5\times 7^1\times {\mathrm{75821}}^1$

素因数の和:75843

約数の個数: 24

約数和(自身を含む): 220793664

約数和(自身を除く): 91822143

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 1701, 75821, 227463, 530747, 682389, 1592241, 2047167, 4776723, 6141501, 14330169, 18424503, 42990507, 128971521]

約数ペア:

[(1, 128971521), (3, 42990507), (7, 18424503), (9, 14330169), (21, 6141501), (27, 4776723), (63, 2047167), (81, 1592241), (189, 682389), (243, 530747), (567, 227463), (1701, 75821)]