20531000

素因数分解:

$2^3\times 5^3\times 7^2\times {\mathrm{419}}^1$

素因数の和:454

約数の個数: 96

約数和(自身を含む): 56019600

約数和(自身を除く): 35488600

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 20, 25, 28, 35, 40, 49, 50, 56, 70, 98, 100, 125, 140, 175, 196, 200, 245, 250, 280, 350, 392, 419, 490, 500, 700, 838, 875, 980, 1000, 1225, 1400, 1676, 1750, 1960, 2095, 2450, 2933, 3352, 3500, 4190, 4900, 5866, 6125, 7000, 8380, 9800, 10475, 11732, 12250, 14665, 16760, 20531, 20950, 23464, 24500, 29330, 41062, 41900, 49000, 52375, 58660, 73325, 82124, 83800, 102655, 104750, 117320, 146650, 164248, 205310, 209500, 293300, 366625, 410620, 419000, 513275, 586600, 733250, 821240, 1026550, 1466500, 2053100, 2566375, 2933000, 4106200, 5132750, 10265500, 20531000]

約数ペア:

[(1, 20531000), (2, 10265500), (4, 5132750), (5, 4106200), (7, 2933000), (8, 2566375), (10, 2053100), (14, 1466500), (20, 1026550), (25, 821240), (28, 733250), (35, 586600), (40, 513275), (49, 419000), (50, 410620), (56, 366625), (70, 293300), (98, 209500), (100, 205310), (125, 164248), (140, 146650), (175, 117320), (196, 104750), (200, 102655), (245, 83800), (250, 82124), (280, 73325), (350, 58660), (392, 52375), (419, 49000), (490, 41900), (500, 41062), (700, 29330), (838, 24500), (875, 23464), (980, 20950), (1000, 20531), (1225, 16760), (1400, 14665), (1676, 12250), (1750, 11732), (1960, 10475), (2095, 9800), (2450, 8380), (2933, 7000), (3352, 6125), (3500, 5866), (4190, 4900)]