20505000

素因数分解:

$2^3\times 3^1\times 5^4\times {\mathrm{1367}}^1$

素因数の和:1396

約数の個数: 80

約数和(自身を含む): 64104480

約数和(自身を除く): 43599480

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 25, 30, 40, 50, 60, 75, 100, 120, 125, 150, 200, 250, 300, 375, 500, 600, 625, 750, 1000, 1250, 1367, 1500, 1875, 2500, 2734, 3000, 3750, 4101, 5000, 5468, 6835, 7500, 8202, 10936, 13670, 15000, 16404, 20505, 27340, 32808, 34175, 41010, 54680, 68350, 82020, 102525, 136700, 164040, 170875, 205050, 273400, 341750, 410100, 512625, 683500, 820200, 854375, 1025250, 1367000, 1708750, 2050500, 2563125, 3417500, 4101000, 5126250, 6835000, 10252500, 20505000]

約数ペア:

[(1, 20505000), (2, 10252500), (3, 6835000), (4, 5126250), (5, 4101000), (6, 3417500), (8, 2563125), (10, 2050500), (12, 1708750), (15, 1367000), (20, 1025250), (24, 854375), (25, 820200), (30, 683500), (40, 512625), (50, 410100), (60, 341750), (75, 273400), (100, 205050), (120, 170875), (125, 164040), (150, 136700), (200, 102525), (250, 82020), (300, 68350), (375, 54680), (500, 41010), (600, 34175), (625, 32808), (750, 27340), (1000, 20505), (1250, 16404), (1367, 15000), (1500, 13670), (1875, 10936), (2500, 8202), (2734, 7500), (3000, 6835), (3750, 5468), (4101, 5000)]