2040291280

素因数分解:

$2^4\times 5^1\times {\mathrm{199}}^1\times {\mathrm{128159}}^1$

素因数の和:128371

約数の個数: 40

約数和(自身を含む): 4767552000

約数和(自身を除く): 2727260720

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 199, 398, 796, 995, 1592, 1990, 3184, 3980, 7960, 15920, 128159, 256318, 512636, 640795, 1025272, 1281590, 2050544, 2563180, 5126360, 10252720, 25503641, 51007282, 102014564, 127518205, 204029128, 255036410, 408058256, 510072820, 1020145640, 2040291280]

約数ペア:

[(1, 2040291280), (2, 1020145640), (4, 510072820), (5, 408058256), (8, 255036410), (10, 204029128), (16, 127518205), (20, 102014564), (40, 51007282), (80, 25503641), (199, 10252720), (398, 5126360), (796, 2563180), (995, 2050544), (1592, 1281590), (1990, 1025272), (3184, 640795), (3980, 512636), (7960, 256318), (15920, 128159)]