639969387

素因数分解:

$3^1\times {\mathrm{43}}^1\times {\mathrm{479}}^1\times {\mathrm{10357}}^1$

素因数の和:10882

約数の個数: 16

約数和(自身を含む): 875043840

約数和(自身を除く): 235074453

約数列:

[1, 3, 43, 129, 479, 1437, 10357, 20597, 31071, 61791, 445351, 1336053, 4961003, 14883009, 213323129, 639969387]

約数ペア:

[(1, 639969387), (3, 213323129), (43, 14883009), (129, 4961003), (479, 1336053), (1437, 445351), (10357, 61791), (20597, 31071)]