81990180

素因数分解:

$2^2\times 3^2\times 5^1\times {\mathrm{281}}^1\times {\mathrm{1621}}^1$

素因数の和:1917

約数の個数: 72

約数和(自身を含む): 249742584

約数和(自身を除く): 167752404

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 30, 36, 45, 60, 90, 180, 281, 562, 843, 1124, 1405, 1621, 1686, 2529, 2810, 3242, 3372, 4215, 4863, 5058, 5620, 6484, 8105, 8430, 9726, 10116, 12645, 14589, 16210, 16860, 19452, 24315, 25290, 29178, 32420, 48630, 50580, 58356, 72945, 97260, 145890, 291780, 455501, 911002, 1366503, 1822004, 2277505, 2733006, 4099509, 4555010, 5466012, 6832515, 8199018, 9110020, 13665030, 16398036, 20497545, 27330060, 40995090, 81990180]

約数ペア:

[(1, 81990180), (2, 40995090), (3, 27330060), (4, 20497545), (5, 16398036), (6, 13665030), (9, 9110020), (10, 8199018), (12, 6832515), (15, 5466012), (18, 4555010), (20, 4099509), (30, 2733006), (36, 2277505), (45, 1822004), (60, 1366503), (90, 911002), (180, 455501), (281, 291780), (562, 145890), (843, 97260), (1124, 72945), (1405, 58356), (1621, 50580), (1686, 48630), (2529, 32420), (2810, 29178), (3242, 25290), (3372, 24315), (4215, 19452), (4863, 16860), (5058, 16210), (5620, 14589), (6484, 12645), (8105, 10116), (8430, 9726)]