18876145

素因数分解:

$5^1\times {\mathrm{61}}^1\times {\mathrm{199}}^1\times {\mathrm{311}}^1$

素因数の和:576

約数の個数: 16

約数和(自身を含む): 23212800

約数和(自身を除く): 4336655

約数列:

[1, 5, 61, 199, 305, 311, 995, 1555, 12139, 18971, 60695, 61889, 94855, 309445, 3775229, 18876145]

約数ペア:

[(1, 18876145), (5, 3775229), (61, 309445), (199, 94855), (305, 61889), (311, 60695), (995, 18971), (1555, 12139)]