20171477680

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{257}}^1\times {\mathrm{51637}}^1$

素因数の和:51926

約数の個数: 80

約数和(自身を含む): 49560086880

約数和(自身を除く): 29388609200

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 257, 304, 380, 514, 760, 1028, 1285, 1520, 2056, 2570, 4112, 4883, 5140, 9766, 10280, 19532, 20560, 24415, 39064, 48830, 51637, 78128, 97660, 103274, 195320, 206548, 258185, 390640, 413096, 516370, 826192, 981103, 1032740, 1962206, 2065480, 3924412, 4130960, 4905515, 7848824, 9811030, 13270709, 15697648, 19622060, 26541418, 39244120, 53082836, 66353545, 78488240, 106165672, 132707090, 212331344, 252143471, 265414180, 504286942, 530828360, 1008573884, 1061656720, 1260717355, 2017147768, 2521434710, 4034295536, 5042869420, 10085738840, 20171477680]

約数ペア:

[(1, 20171477680), (2, 10085738840), (4, 5042869420), (5, 4034295536), (8, 2521434710), (10, 2017147768), (16, 1260717355), (19, 1061656720), (20, 1008573884), (38, 530828360), (40, 504286942), (76, 265414180), (80, 252143471), (95, 212331344), (152, 132707090), (190, 106165672), (257, 78488240), (304, 66353545), (380, 53082836), (514, 39244120), (760, 26541418), (1028, 19622060), (1285, 15697648), (1520, 13270709), (2056, 9811030), (2570, 7848824), (4112, 4905515), (4883, 4130960), (5140, 3924412), (9766, 2065480), (10280, 1962206), (19532, 1032740), (20560, 981103), (24415, 826192), (39064, 516370), (48830, 413096), (51637, 390640), (78128, 258185), (97660, 206548), (103274, 195320)]