254720

素因数分解:

$2^8\times 5^1\times {\mathrm{199}}^1$

素因数の和:220

約数の個数: 36

約数和(自身を含む): 613200

約数和(自身を除く): 358480

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 199, 256, 320, 398, 640, 796, 995, 1280, 1592, 1990, 3184, 3980, 6368, 7960, 12736, 15920, 25472, 31840, 50944, 63680, 127360, 254720]

約数ペア:

[(1, 254720), (2, 127360), (4, 63680), (5, 50944), (8, 31840), (10, 25472), (16, 15920), (20, 12736), (32, 7960), (40, 6368), (64, 3980), (80, 3184), (128, 1990), (160, 1592), (199, 1280), (256, 995), (320, 796), (398, 640)]