81446720

素因数分解:

$2^6\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1279}}^1$

素因数の和:1495

約数の個数: 56

約数和(自身を含む): 195072000

約数和(自身を除く): 113625280

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 199, 320, 398, 796, 995, 1279, 1592, 1990, 2558, 3184, 3980, 5116, 6368, 6395, 7960, 10232, 12736, 12790, 15920, 20464, 25580, 31840, 40928, 51160, 63680, 81856, 102320, 204640, 254521, 409280, 509042, 1018084, 1272605, 2036168, 2545210, 4072336, 5090420, 8144672, 10180840, 16289344, 20361680, 40723360, 81446720]

約数ペア:

[(1, 81446720), (2, 40723360), (4, 20361680), (5, 16289344), (8, 10180840), (10, 8144672), (16, 5090420), (20, 4072336), (32, 2545210), (40, 2036168), (64, 1272605), (80, 1018084), (160, 509042), (199, 409280), (320, 254521), (398, 204640), (796, 102320), (995, 81856), (1279, 63680), (1592, 51160), (1990, 40928), (2558, 31840), (3184, 25580), (3980, 20464), (5116, 15920), (6368, 12790), (6395, 12736), (7960, 10232)]