18729800

素因数分解:

$2^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1319}}^1$

素因数の和:1406

約数の個数: 48

約数和(自身を含む): 44193600

約数和(自身を除く): 25463800

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 71, 100, 142, 200, 284, 355, 568, 710, 1319, 1420, 1775, 2638, 2840, 3550, 5276, 6595, 7100, 10552, 13190, 14200, 26380, 32975, 52760, 65950, 93649, 131900, 187298, 263800, 374596, 468245, 749192, 936490, 1872980, 2341225, 3745960, 4682450, 9364900, 18729800]

約数ペア:

[(1, 18729800), (2, 9364900), (4, 4682450), (5, 3745960), (8, 2341225), (10, 1872980), (20, 936490), (25, 749192), (40, 468245), (50, 374596), (71, 263800), (100, 187298), (142, 131900), (200, 93649), (284, 65950), (355, 52760), (568, 32975), (710, 26380), (1319, 14200), (1420, 13190), (1775, 10552), (2638, 7100), (2840, 6595), (3550, 5276)]