19975150

素因数分解:

$2^1\times 5^2\times {\mathrm{13}}^1\times {\mathrm{79}}^1\times {\mathrm{389}}^1$

素因数の和:493

約数の個数: 48

約数和(自身を含む): 40622400

約数和(自身を除く): 20647250

約数列:

[1, 2, 5, 10, 13, 25, 26, 50, 65, 79, 130, 158, 325, 389, 395, 650, 778, 790, 1027, 1945, 1975, 2054, 3890, 3950, 5057, 5135, 9725, 10114, 10270, 19450, 25285, 25675, 30731, 50570, 51350, 61462, 126425, 153655, 252850, 307310, 399503, 768275, 799006, 1536550, 1997515, 3995030, 9987575, 19975150]

約数ペア:

[(1, 19975150), (2, 9987575), (5, 3995030), (10, 1997515), (13, 1536550), (25, 799006), (26, 768275), (50, 399503), (65, 307310), (79, 252850), (130, 153655), (158, 126425), (325, 61462), (389, 51350), (395, 50570), (650, 30731), (778, 25675), (790, 25285), (1027, 19450), (1945, 10270), (1975, 10114), (2054, 9725), (3890, 5135), (3950, 5057)]