81231800

素因数分解:

$2^3\times 5^2\times {\mathrm{13}}^1\times {\mathrm{157}}^1\times {\mathrm{199}}^1$

素因数の和:385

約数の個数: 96

約数和(自身を含む): 205716000

約数和(自身を除く): 124484200

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 25, 26, 40, 50, 52, 65, 100, 104, 130, 157, 199, 200, 260, 314, 325, 398, 520, 628, 650, 785, 796, 995, 1256, 1300, 1570, 1592, 1990, 2041, 2587, 2600, 3140, 3925, 3980, 4082, 4975, 5174, 6280, 7850, 7960, 8164, 9950, 10205, 10348, 12935, 15700, 16328, 19900, 20410, 20696, 25870, 31243, 31400, 39800, 40820, 51025, 51740, 62486, 64675, 81640, 102050, 103480, 124972, 129350, 156215, 204100, 249944, 258700, 312430, 406159, 408200, 517400, 624860, 781075, 812318, 1249720, 1562150, 1624636, 2030795, 3124300, 3249272, 4061590, 6248600, 8123180, 10153975, 16246360, 20307950, 40615900, 81231800]

約数ペア:

[(1, 81231800), (2, 40615900), (4, 20307950), (5, 16246360), (8, 10153975), (10, 8123180), (13, 6248600), (20, 4061590), (25, 3249272), (26, 3124300), (40, 2030795), (50, 1624636), (52, 1562150), (65, 1249720), (100, 812318), (104, 781075), (130, 624860), (157, 517400), (199, 408200), (200, 406159), (260, 312430), (314, 258700), (325, 249944), (398, 204100), (520, 156215), (628, 129350), (650, 124972), (785, 103480), (796, 102050), (995, 81640), (1256, 64675), (1300, 62486), (1570, 51740), (1592, 51025), (1990, 40820), (2041, 39800), (2587, 31400), (2600, 31243), (3140, 25870), (3925, 20696), (3980, 20410), (4082, 19900), (4975, 16328), (5174, 15700), (6280, 12935), (7850, 10348), (7960, 10205), (8164, 9950)]