1991709

素因数分解:

$3^4\times {\mathrm{67}}^1\times {\mathrm{367}}^1$

素因数の和:446

約数の個数: 20

約数和(自身を含む): 3027904

約数和(自身を除く): 1036195

約数列:

[1, 3, 9, 27, 67, 81, 201, 367, 603, 1101, 1809, 3303, 5427, 9909, 24589, 29727, 73767, 221301, 663903, 1991709]

約数ペア:

[(1, 1991709), (3, 663903), (9, 221301), (27, 73767), (67, 29727), (81, 24589), (201, 9909), (367, 5427), (603, 3303), (1101, 1809)]