17986989

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{29}}^1\times {\mathrm{89}}^1\times {\mathrm{101}}^1$

素因数の和:245

約数の個数: 32

約数和(自身を含む): 26438400

約数和(自身を除く): 8451411

約数列:

[1, 3, 23, 29, 69, 87, 89, 101, 267, 303, 667, 2001, 2047, 2323, 2581, 2929, 6141, 6969, 7743, 8787, 8989, 26967, 59363, 67367, 178089, 202101, 206747, 260681, 620241, 782043, 5995663, 17986989]

約数ペア:

[(1, 17986989), (3, 5995663), (23, 782043), (29, 620241), (69, 260681), (87, 206747), (89, 202101), (101, 178089), (267, 67367), (303, 59363), (667, 26967), (2001, 8989), (2047, 8787), (2323, 7743), (2581, 6969), (2929, 6141)]