81701440

素因数分解:

$2^6\times 5^1\times {\mathrm{199}}^1\times {\mathrm{1283}}^1$

素因数の和:1499

約数の個数: 56

約数和(自身を含む): 195681600

約数和(自身を除く): 113980160

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 199, 320, 398, 796, 995, 1283, 1592, 1990, 2566, 3184, 3980, 5132, 6368, 6415, 7960, 10264, 12736, 12830, 15920, 20528, 25660, 31840, 41056, 51320, 63680, 82112, 102640, 205280, 255317, 410560, 510634, 1021268, 1276585, 2042536, 2553170, 4085072, 5106340, 8170144, 10212680, 16340288, 20425360, 40850720, 81701440]

約数ペア:

[(1, 81701440), (2, 40850720), (4, 20425360), (5, 16340288), (8, 10212680), (10, 8170144), (16, 5106340), (20, 4085072), (32, 2553170), (40, 2042536), (64, 1276585), (80, 1021268), (160, 510634), (199, 410560), (320, 255317), (398, 205280), (796, 102640), (995, 82112), (1283, 63680), (1592, 51320), (1990, 41056), (2566, 31840), (3184, 25660), (3980, 20528), (5132, 15920), (6368, 12830), (6415, 12736), (7960, 10264)]