20009007

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{173}}^1\times {\mathrm{181}}^1$

素因数の和:431

約数の個数: 24

約数和(自身を含む): 29641248

約数和(自身を除く): 9632241

約数列:

[1, 3, 9, 71, 173, 181, 213, 519, 543, 639, 1557, 1629, 12283, 12851, 31313, 36849, 38553, 93939, 110547, 115659, 281817, 2223223, 6669669, 20009007]

約数ペア:

[(1, 20009007), (3, 6669669), (9, 2223223), (71, 281817), (173, 115659), (181, 110547), (213, 93939), (519, 38553), (543, 36849), (639, 31313), (1557, 12851), (1629, 12283)]