128435750

素因数分解:

$2^1\times 5^3\times {\mathrm{257}}^1\times {\mathrm{1999}}^1$

素因数の和:2273

約数の個数: 32

約数和(自身を含む): 241488000

約数和(自身を除く): 113052250

約数列:

[1, 2, 5, 10, 25, 50, 125, 250, 257, 514, 1285, 1999, 2570, 3998, 6425, 9995, 12850, 19990, 32125, 49975, 64250, 99950, 249875, 499750, 513743, 1027486, 2568715, 5137430, 12843575, 25687150, 64217875, 128435750]

約数ペア:

[(1, 128435750), (2, 64217875), (5, 25687150), (10, 12843575), (25, 5137430), (50, 2568715), (125, 1027486), (250, 513743), (257, 499750), (514, 249875), (1285, 99950), (1999, 64250), (2570, 49975), (3998, 32125), (6425, 19990), (9995, 12850)]