19712120

素因数分解:

$2^3\times 5^1\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{701}}^1$

素因数の和:768

約数の個数: 64

約数和(自身を含む): 48016800

約数和(自身を除く): 28304680

約数列:

[1, 2, 4, 5, 8, 10, 19, 20, 37, 38, 40, 74, 76, 95, 148, 152, 185, 190, 296, 370, 380, 701, 703, 740, 760, 1402, 1406, 1480, 2804, 2812, 3505, 3515, 5608, 5624, 7010, 7030, 13319, 14020, 14060, 25937, 26638, 28040, 28120, 51874, 53276, 66595, 103748, 106552, 129685, 133190, 207496, 259370, 266380, 492803, 518740, 532760, 985606, 1037480, 1971212, 2464015, 3942424, 4928030, 9856060, 19712120]

約数ペア:

[(1, 19712120), (2, 9856060), (4, 4928030), (5, 3942424), (8, 2464015), (10, 1971212), (19, 1037480), (20, 985606), (37, 532760), (38, 518740), (40, 492803), (74, 266380), (76, 259370), (95, 207496), (148, 133190), (152, 129685), (185, 106552), (190, 103748), (296, 66595), (370, 53276), (380, 51874), (701, 28120), (703, 28040), (740, 26638), (760, 25937), (1402, 14060), (1406, 14020), (1480, 13319), (2804, 7030), (2812, 7010), (3505, 5624), (3515, 5608)]