29990000

素因数分解:

$2^4\times 5^4\times {\mathrm{2999}}^1$

素因数の和:3027

約数の個数: 50

約数和(自身を含む): 72633000

約数和(自身を除く): 42643000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 2000, 2500, 2999, 5000, 5998, 10000, 11996, 14995, 23992, 29990, 47984, 59980, 74975, 119960, 149950, 239920, 299900, 374875, 599800, 749750, 1199600, 1499500, 1874375, 2999000, 3748750, 5998000, 7497500, 14995000, 29990000]

約数ペア:

[(1, 29990000), (2, 14995000), (4, 7497500), (5, 5998000), (8, 3748750), (10, 2999000), (16, 1874375), (20, 1499500), (25, 1199600), (40, 749750), (50, 599800), (80, 374875), (100, 299900), (125, 239920), (200, 149950), (250, 119960), (400, 74975), (500, 59980), (625, 47984), (1000, 29990), (1250, 23992), (2000, 14995), (2500, 11996), (2999, 10000), (5000, 5998)]