19937500

素因数分解:

$2^2\times 5^6\times {\mathrm{11}}^1\times {\mathrm{29}}^1$

素因数の和:74

約数の個数: 84

約数和(自身を含む): 49218120

約数和(自身を除く): 29280620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 25, 29, 44, 50, 55, 58, 100, 110, 116, 125, 145, 220, 250, 275, 290, 319, 500, 550, 580, 625, 638, 725, 1100, 1250, 1276, 1375, 1450, 1595, 2500, 2750, 2900, 3125, 3190, 3625, 5500, 6250, 6380, 6875, 7250, 7975, 12500, 13750, 14500, 15625, 15950, 18125, 27500, 31250, 31900, 34375, 36250, 39875, 62500, 68750, 72500, 79750, 90625, 137500, 159500, 171875, 181250, 199375, 343750, 362500, 398750, 453125, 687500, 797500, 906250, 996875, 1812500, 1993750, 3987500, 4984375, 9968750, 19937500]

約数ペア:

[(1, 19937500), (2, 9968750), (4, 4984375), (5, 3987500), (10, 1993750), (11, 1812500), (20, 996875), (22, 906250), (25, 797500), (29, 687500), (44, 453125), (50, 398750), (55, 362500), (58, 343750), (100, 199375), (110, 181250), (116, 171875), (125, 159500), (145, 137500), (220, 90625), (250, 79750), (275, 72500), (290, 68750), (319, 62500), (500, 39875), (550, 36250), (580, 34375), (625, 31900), (638, 31250), (725, 27500), (1100, 18125), (1250, 15950), (1276, 15625), (1375, 14500), (1450, 13750), (1595, 12500), (2500, 7975), (2750, 7250), (2900, 6875), (3125, 6380), (3190, 6250), (3625, 5500)]