509440

素因数分解:

$2^9\times 5^1\times {\mathrm{199}}^1$

素因数の和:222

約数の個数: 40

約数和(自身を含む): 1227600

約数和(自身を除く): 718160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 199, 256, 320, 398, 512, 640, 796, 995, 1280, 1592, 1990, 2560, 3184, 3980, 6368, 7960, 12736, 15920, 25472, 31840, 50944, 63680, 101888, 127360, 254720, 509440]

約数ペア:

[(1, 509440), (2, 254720), (4, 127360), (5, 101888), (8, 63680), (10, 50944), (16, 31840), (20, 25472), (32, 15920), (40, 12736), (64, 7960), (80, 6368), (128, 3980), (160, 3184), (199, 2560), (256, 1990), (320, 1592), (398, 1280), (512, 995), (640, 796)]