20007800

素因数分解:

$2^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1409}}^1$

素因数の和:1496

約数の個数: 48

約数和(自身を含む): 47206800

約数和(自身を除く): 27199000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 71, 100, 142, 200, 284, 355, 568, 710, 1409, 1420, 1775, 2818, 2840, 3550, 5636, 7045, 7100, 11272, 14090, 14200, 28180, 35225, 56360, 70450, 100039, 140900, 200078, 281800, 400156, 500195, 800312, 1000390, 2000780, 2500975, 4001560, 5001950, 10003900, 20007800]

約数ペア:

[(1, 20007800), (2, 10003900), (4, 5001950), (5, 4001560), (8, 2500975), (10, 2000780), (20, 1000390), (25, 800312), (40, 500195), (50, 400156), (71, 281800), (100, 200078), (142, 140900), (200, 100039), (284, 70450), (355, 56360), (568, 35225), (710, 28180), (1409, 14200), (1420, 14090), (1775, 11272), (2818, 7100), (2840, 7045), (3550, 5636)]