20405000

素因数分解:

$2^3\times 5^4\times 7^1\times {\mathrm{11}}^1\times {\mathrm{53}}^1$

素因数の和:97

約数の個数: 160

約数和(自身を含む): 60730560

約数和(自身を除く): 40325560

約数列:

[1, 2, 4, 5, 7, 8, 10, 11, 14, 20, 22, 25, 28, 35, 40, 44, 50, 53, 55, 56, 70, 77, 88, 100, 106, 110, 125, 140, 154, 175, 200, 212, 220, 250, 265, 275, 280, 308, 350, 371, 385, 424, 440, 500, 530, 550, 583, 616, 625, 700, 742, 770, 875, 1000, 1060, 1100, 1166, 1250, 1325, 1375, 1400, 1484, 1540, 1750, 1855, 1925, 2120, 2200, 2332, 2500, 2650, 2750, 2915, 2968, 3080, 3500, 3710, 3850, 4081, 4375, 4664, 5000, 5300, 5500, 5830, 6625, 6875, 7000, 7420, 7700, 8162, 8750, 9275, 9625, 10600, 11000, 11660, 13250, 13750, 14575, 14840, 15400, 16324, 17500, 18550, 19250, 20405, 23320, 26500, 27500, 29150, 32648, 33125, 35000, 37100, 38500, 40810, 46375, 48125, 53000, 55000, 58300, 66250, 72875, 74200, 77000, 81620, 92750, 96250, 102025, 116600, 132500, 145750, 163240, 185500, 192500, 204050, 231875, 265000, 291500, 364375, 371000, 385000, 408100, 463750, 510125, 583000, 728750, 816200, 927500, 1020250, 1457500, 1855000, 2040500, 2550625, 2915000, 4081000, 5101250, 10202500, 20405000]

約数ペア:

[(1, 20405000), (2, 10202500), (4, 5101250), (5, 4081000), (7, 2915000), (8, 2550625), (10, 2040500), (11, 1855000), (14, 1457500), (20, 1020250), (22, 927500), (25, 816200), (28, 728750), (35, 583000), (40, 510125), (44, 463750), (50, 408100), (53, 385000), (55, 371000), (56, 364375), (70, 291500), (77, 265000), (88, 231875), (100, 204050), (106, 192500), (110, 185500), (125, 163240), (140, 145750), (154, 132500), (175, 116600), (200, 102025), (212, 96250), (220, 92750), (250, 81620), (265, 77000), (275, 74200), (280, 72875), (308, 66250), (350, 58300), (371, 55000), (385, 53000), (424, 48125), (440, 46375), (500, 40810), (530, 38500), (550, 37100), (583, 35000), (616, 33125), (625, 32648), (700, 29150), (742, 27500), (770, 26500), (875, 23320), (1000, 20405), (1060, 19250), (1100, 18550), (1166, 17500), (1250, 16324), (1325, 15400), (1375, 14840), (1400, 14575), (1484, 13750), (1540, 13250), (1750, 11660), (1855, 11000), (1925, 10600), (2120, 9625), (2200, 9275), (2332, 8750), (2500, 8162), (2650, 7700), (2750, 7420), (2915, 7000), (2968, 6875), (3080, 6625), (3500, 5830), (3710, 5500), (3850, 5300), (4081, 5000), (4375, 4664)]