21395000

素因数分解:

$2^3\times 5^4\times {\mathrm{11}}^1\times {\mathrm{389}}^1$

素因数の和:426

約数の個数: 80

約数和(自身を含む): 54826200

約数和(自身を除く): 33431200

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 25, 40, 44, 50, 55, 88, 100, 110, 125, 200, 220, 250, 275, 389, 440, 500, 550, 625, 778, 1000, 1100, 1250, 1375, 1556, 1945, 2200, 2500, 2750, 3112, 3890, 4279, 5000, 5500, 6875, 7780, 8558, 9725, 11000, 13750, 15560, 17116, 19450, 21395, 27500, 34232, 38900, 42790, 48625, 55000, 77800, 85580, 97250, 106975, 171160, 194500, 213950, 243125, 389000, 427900, 486250, 534875, 855800, 972500, 1069750, 1945000, 2139500, 2674375, 4279000, 5348750, 10697500, 21395000]

約数ペア:

[(1, 21395000), (2, 10697500), (4, 5348750), (5, 4279000), (8, 2674375), (10, 2139500), (11, 1945000), (20, 1069750), (22, 972500), (25, 855800), (40, 534875), (44, 486250), (50, 427900), (55, 389000), (88, 243125), (100, 213950), (110, 194500), (125, 171160), (200, 106975), (220, 97250), (250, 85580), (275, 77800), (389, 55000), (440, 48625), (500, 42790), (550, 38900), (625, 34232), (778, 27500), (1000, 21395), (1100, 19450), (1250, 17116), (1375, 15560), (1556, 13750), (1945, 11000), (2200, 9725), (2500, 8558), (2750, 7780), (3112, 6875), (3890, 5500), (4279, 5000)]