18881739

素因数分解:

$3^2\times {\mathrm{67}}^1\times {\mathrm{173}}^1\times {\mathrm{181}}^1$

素因数の和:427

約数の個数: 24

約数和(自身を含む): 27994512

約数和(自身を除く): 9112773

約数列:

[1, 3, 9, 67, 173, 181, 201, 519, 543, 603, 1557, 1629, 11591, 12127, 31313, 34773, 36381, 93939, 104319, 109143, 281817, 2097971, 6293913, 18881739]

約数ペア:

[(1, 18881739), (3, 6293913), (9, 2097971), (67, 281817), (173, 109143), (181, 104319), (201, 93939), (519, 36381), (543, 34773), (603, 31313), (1557, 12127), (1629, 11591)]