20758240

素因数分解:

$2^5\times 5^1\times {\mathrm{137}}^1\times {\mathrm{947}}^1$

素因数の和:1099

約数の個数: 48

約数和(自身を含む): 49451472

約数和(自身を除く): 28693232

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 137, 160, 274, 548, 685, 947, 1096, 1370, 1894, 2192, 2740, 3788, 4384, 4735, 5480, 7576, 9470, 10960, 15152, 18940, 21920, 30304, 37880, 75760, 129739, 151520, 259478, 518956, 648695, 1037912, 1297390, 2075824, 2594780, 4151648, 5189560, 10379120, 20758240]

約数ペア:

[(1, 20758240), (2, 10379120), (4, 5189560), (5, 4151648), (8, 2594780), (10, 2075824), (16, 1297390), (20, 1037912), (32, 648695), (40, 518956), (80, 259478), (137, 151520), (160, 129739), (274, 75760), (548, 37880), (685, 30304), (947, 21920), (1096, 18940), (1370, 15152), (1894, 10960), (2192, 9470), (2740, 7576), (3788, 5480), (4384, 4735)]