20066560

素因数分解:

$2^8\times 5^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:339

約数の個数: 72

約数和(自身を含む): 49043736

約数和(自身を除く): 28977176

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 61, 64, 80, 122, 128, 160, 244, 256, 257, 305, 320, 488, 514, 610, 640, 976, 1028, 1220, 1280, 1285, 1952, 2056, 2440, 2570, 3904, 4112, 4880, 5140, 7808, 8224, 9760, 10280, 15616, 15677, 16448, 19520, 20560, 31354, 32896, 39040, 41120, 62708, 65792, 78080, 78385, 82240, 125416, 156770, 164480, 250832, 313540, 328960, 501664, 627080, 1003328, 1254160, 2006656, 2508320, 4013312, 5016640, 10033280, 20066560]

約数ペア:

[(1, 20066560), (2, 10033280), (4, 5016640), (5, 4013312), (8, 2508320), (10, 2006656), (16, 1254160), (20, 1003328), (32, 627080), (40, 501664), (61, 328960), (64, 313540), (80, 250832), (122, 164480), (128, 156770), (160, 125416), (244, 82240), (256, 78385), (257, 78080), (305, 65792), (320, 62708), (488, 41120), (514, 39040), (610, 32896), (640, 31354), (976, 20560), (1028, 19520), (1220, 16448), (1280, 15677), (1285, 15616), (1952, 10280), (2056, 9760), (2440, 8224), (2570, 7808), (3904, 5140), (4112, 4880)]