81917120

素因数分解:

$2^6\times 5^1\times {\mathrm{281}}^1\times {\mathrm{911}}^1$

素因数の和:1209

約数の個数: 56

約数和(自身を含む): 195974208

約数和(自身を除く): 114057088

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 160, 281, 320, 562, 911, 1124, 1405, 1822, 2248, 2810, 3644, 4496, 4555, 5620, 7288, 8992, 9110, 11240, 14576, 17984, 18220, 22480, 29152, 36440, 44960, 58304, 72880, 89920, 145760, 255991, 291520, 511982, 1023964, 1279955, 2047928, 2559910, 4095856, 5119820, 8191712, 10239640, 16383424, 20479280, 40958560, 81917120]

約数ペア:

[(1, 81917120), (2, 40958560), (4, 20479280), (5, 16383424), (8, 10239640), (10, 8191712), (16, 5119820), (20, 4095856), (32, 2559910), (40, 2047928), (64, 1279955), (80, 1023964), (160, 511982), (281, 291520), (320, 255991), (562, 145760), (911, 89920), (1124, 72880), (1405, 58304), (1822, 44960), (2248, 36440), (2810, 29152), (3644, 22480), (4496, 18220), (4555, 17984), (5620, 14576), (7288, 11240), (8992, 9110)]