20985000

素因数分解:

$2^3\times 3^1\times 5^4\times {\mathrm{1399}}^1$

素因数の和:1428

約数の個数: 80

約数和(自身を含む): 65604000

約数和(自身を除く): 44619000

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, 1399, 1500, 1875, 2500, 2798, 3000, 3750, 4197, 5000, 5596, 6995, 7500, 8394, 11192, 13990, 15000, 16788, 20985, 27980, 33576, 34975, 41970, 55960, 69950, 83940, 104925, 139900, 167880, 174875, 209850, 279800, 349750, 419700, 524625, 699500, 839400, 874375, 1049250, 1399000, 1748750, 2098500, 2623125, 3497500, 4197000, 5246250, 6995000, 10492500, 20985000]

約数ペア:

[(1, 20985000), (2, 10492500), (3, 6995000), (4, 5246250), (5, 4197000), (6, 3497500), (8, 2623125), (10, 2098500), (12, 1748750), (15, 1399000), (20, 1049250), (24, 874375), (25, 839400), (30, 699500), (40, 524625), (50, 419700), (60, 349750), (75, 279800), (100, 209850), (120, 174875), (125, 167880), (150, 139900), (200, 104925), (250, 83940), (300, 69950), (375, 55960), (500, 41970), (600, 34975), (625, 33576), (750, 27980), (1000, 20985), (1250, 16788), (1399, 15000), (1500, 13990), (1875, 11192), (2500, 8394), (2798, 7500), (3000, 6995), (3750, 5596), (4197, 5000)]