638403957

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{639043}}^1$

素因数の和:639089

約数の個数: 16

約数和(自身を含む): 971346880

約数和(自身を除く): 332942923

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 639043, 1917129, 5751387, 17254161, 23644591, 70933773, 212801319, 638403957]

約数ペア:

[(1, 638403957), (3, 212801319), (9, 70933773), (27, 23644591), (37, 17254161), (111, 5751387), (333, 1917129), (999, 639043)]