18987521

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{379}}^1\times {\mathrm{421}}^1$

素因数の和:824

約数の個数: 16

約数和(自身を含む): 23091840

約数和(自身を除く): 4104319

約数列:

[1, 7, 17, 119, 379, 421, 2653, 2947, 6443, 7157, 45101, 50099, 159559, 1116913, 2712503, 18987521]

約数ペア:

[(1, 18987521), (7, 2712503), (17, 1116913), (119, 159559), (379, 50099), (421, 45101), (2653, 7157), (2947, 6443)]