126720640

素因数分解:

$2^7\times 5^1\times {\mathrm{389}}^1\times {\mathrm{509}}^1$

素因数の和:917

約数の個数: 64

約数和(自身を含む): 304317000

約数和(自身を除く): 177596360

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 128, 160, 320, 389, 509, 640, 778, 1018, 1556, 1945, 2036, 2545, 3112, 3890, 4072, 5090, 6224, 7780, 8144, 10180, 12448, 15560, 16288, 20360, 24896, 31120, 32576, 40720, 49792, 62240, 65152, 81440, 124480, 162880, 198001, 248960, 325760, 396002, 792004, 990005, 1584008, 1980010, 3168016, 3960020, 6336032, 7920040, 12672064, 15840080, 25344128, 31680160, 63360320, 126720640]

約数ペア:

[(1, 126720640), (2, 63360320), (4, 31680160), (5, 25344128), (8, 15840080), (10, 12672064), (16, 7920040), (20, 6336032), (32, 3960020), (40, 3168016), (64, 1980010), (80, 1584008), (128, 990005), (160, 792004), (320, 396002), (389, 325760), (509, 248960), (640, 198001), (778, 162880), (1018, 124480), (1556, 81440), (1945, 65152), (2036, 62240), (2545, 49792), (3112, 40720), (3890, 32576), (4072, 31120), (5090, 24896), (6224, 20360), (7780, 16288), (8144, 15560), (10180, 12448)]