20591000

素因数分解:

$2^3\times 5^3\times {\mathrm{59}}^1\times {\mathrm{349}}^1$

素因数の和:429

約数の個数: 64

約数和(自身を含む): 49140000

約数和(自身を除く): 28549000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 59, 100, 118, 125, 200, 236, 250, 295, 349, 472, 500, 590, 698, 1000, 1180, 1396, 1475, 1745, 2360, 2792, 2950, 3490, 5900, 6980, 7375, 8725, 11800, 13960, 14750, 17450, 20591, 29500, 34900, 41182, 43625, 59000, 69800, 82364, 87250, 102955, 164728, 174500, 205910, 349000, 411820, 514775, 823640, 1029550, 2059100, 2573875, 4118200, 5147750, 10295500, 20591000]

約数ペア:

[(1, 20591000), (2, 10295500), (4, 5147750), (5, 4118200), (8, 2573875), (10, 2059100), (20, 1029550), (25, 823640), (40, 514775), (50, 411820), (59, 349000), (100, 205910), (118, 174500), (125, 164728), (200, 102955), (236, 87250), (250, 82364), (295, 69800), (349, 59000), (472, 43625), (500, 41182), (590, 34900), (698, 29500), (1000, 20591), (1180, 17450), (1396, 14750), (1475, 13960), (1745, 11800), (2360, 8725), (2792, 7375), (2950, 6980), (3490, 5900)]