19865800

素因数分解:

$2^3\times 5^2\times {\mathrm{71}}^1\times {\mathrm{1399}}^1$

素因数の和:1486

約数の個数: 48

約数和(自身を含む): 46872000

約数和(自身を除く): 27006200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 71, 100, 142, 200, 284, 355, 568, 710, 1399, 1420, 1775, 2798, 2840, 3550, 5596, 6995, 7100, 11192, 13990, 14200, 27980, 34975, 55960, 69950, 99329, 139900, 198658, 279800, 397316, 496645, 794632, 993290, 1986580, 2483225, 3973160, 4966450, 9932900, 19865800]

約数ペア:

[(1, 19865800), (2, 9932900), (4, 4966450), (5, 3973160), (8, 2483225), (10, 1986580), (20, 993290), (25, 794632), (40, 496645), (50, 397316), (71, 279800), (100, 198658), (142, 139900), (200, 99329), (284, 69950), (355, 55960), (568, 34975), (710, 27980), (1399, 14200), (1420, 13990), (1775, 11192), (2798, 7100), (2840, 6995), (3550, 5596)]