19988175

素因数分解:

$3^1\times 5^2\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{257}}^1$

素因数の和:348

約数の個数: 48

約数和(自身を含む): 35703072

約数和(自身を除く): 15714897

約数列:

[1, 3, 5, 15, 17, 25, 51, 61, 75, 85, 183, 255, 257, 305, 425, 771, 915, 1037, 1275, 1285, 1525, 3111, 3855, 4369, 4575, 5185, 6425, 13107, 15555, 15677, 19275, 21845, 25925, 47031, 65535, 77775, 78385, 109225, 235155, 266509, 327675, 391925, 799527, 1175775, 1332545, 3997635, 6662725, 19988175]

約数ペア:

[(1, 19988175), (3, 6662725), (5, 3997635), (15, 1332545), (17, 1175775), (25, 799527), (51, 391925), (61, 327675), (75, 266509), (85, 235155), (183, 109225), (255, 78385), (257, 77775), (305, 65535), (425, 47031), (771, 25925), (915, 21845), (1037, 19275), (1275, 15677), (1285, 15555), (1525, 13107), (3111, 6425), (3855, 5185), (4369, 4575)]