21319989

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{101}}^1\times {\mathrm{4139}}^1$

素因数の和:4260

約数の個数: 16

約数和(自身を含む): 30404160

約数和(自身を除く): 9084171

約数列:

[1, 3, 17, 51, 101, 303, 1717, 4139, 5151, 12417, 70363, 211089, 418039, 1254117, 7106663, 21319989]

約数ペア:

[(1, 21319989), (3, 7106663), (17, 1254117), (51, 418039), (101, 211089), (303, 70363), (1717, 12417), (4139, 5151)]