644773689

素因数分解:

$3^4\times 7^1\times {\mathrm{1137167}}^1$

素因数の和:1137186

約数の個数: 20

約数和(自身を含む): 1100778624

約数和(自身を除く): 456004935

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 1137167, 3411501, 7960169, 10234503, 23880507, 30703509, 71641521, 92110527, 214924563, 644773689]

約数ペア:

[(1, 644773689), (3, 214924563), (7, 92110527), (9, 71641521), (21, 30703509), (27, 23880507), (63, 10234503), (81, 7960169), (189, 3411501), (567, 1137167)]