278103640

素因数分解:

$2^3\times 5^1\times {\mathrm{89}}^1\times {\mathrm{191}}^1\times {\mathrm{409}}^1$

素因数の和:700

約数の個数: 64

約数和(自身を含む): 637632000

約数和(自身を除く): 359528360

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 89, 178, 191, 356, 382, 409, 445, 712, 764, 818, 890, 955, 1528, 1636, 1780, 1910, 2045, 3272, 3560, 3820, 4090, 7640, 8180, 16360, 16999, 33998, 36401, 67996, 72802, 78119, 84995, 135992, 145604, 156238, 169990, 182005, 291208, 312476, 339980, 364010, 390595, 624952, 679960, 728020, 781190, 1456040, 1562380, 3124760, 6952591, 13905182, 27810364, 34762955, 55620728, 69525910, 139051820, 278103640]

約数ペア:

[(1, 278103640), (2, 139051820), (4, 69525910), (5, 55620728), (8, 34762955), (10, 27810364), (20, 13905182), (40, 6952591), (89, 3124760), (178, 1562380), (191, 1456040), (356, 781190), (382, 728020), (409, 679960), (445, 624952), (712, 390595), (764, 364010), (818, 339980), (890, 312476), (955, 291208), (1528, 182005), (1636, 169990), (1780, 156238), (1910, 145604), (2045, 135992), (3272, 84995), (3560, 78119), (3820, 72802), (4090, 67996), (7640, 36401), (8180, 33998), (16360, 16999)]