21551800

素因数分解:

$2^3\times 5^2\times {\mathrm{197}}^1\times {\mathrm{547}}^1$

素因数の和:760

約数の個数: 48

約数和(自身を含む): 50454360

約数和(自身を除く): 28902560

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 197, 200, 394, 547, 788, 985, 1094, 1576, 1970, 2188, 2735, 3940, 4376, 4925, 5470, 7880, 9850, 10940, 13675, 19700, 21880, 27350, 39400, 54700, 107759, 109400, 215518, 431036, 538795, 862072, 1077590, 2155180, 2693975, 4310360, 5387950, 10775900, 21551800]

約数ペア:

[(1, 21551800), (2, 10775900), (4, 5387950), (5, 4310360), (8, 2693975), (10, 2155180), (20, 1077590), (25, 862072), (40, 538795), (50, 431036), (100, 215518), (197, 109400), (200, 107759), (394, 54700), (547, 39400), (788, 27350), (985, 21880), (1094, 19700), (1576, 13675), (1970, 10940), (2188, 9850), (2735, 7880), (3940, 5470), (4376, 4925)]