21017899

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{239}}^1\times {\mathrm{739}}^1$

素因数の和:1002

約数の個数: 16

約数和(自身を含む): 25574400

約数和(自身を除く): 4556501

約数列:

[1, 7, 17, 119, 239, 739, 1673, 4063, 5173, 12563, 28441, 87941, 176621, 1236347, 3002557, 21017899]

約数ペア:

[(1, 21017899), (7, 3002557), (17, 1236347), (119, 176621), (239, 87941), (739, 28441), (1673, 12563), (4063, 5173)]