21707800

素因数分解:

$2^3\times 5^2\times {\mathrm{311}}^1\times {\mathrm{349}}^1$

素因数の和:676

約数の個数: 48

約数和(自身を含む): 50778000

約数和(自身を除く): 29070200

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 200, 311, 349, 622, 698, 1244, 1396, 1555, 1745, 2488, 2792, 3110, 3490, 6220, 6980, 7775, 8725, 12440, 13960, 15550, 17450, 31100, 34900, 62200, 69800, 108539, 217078, 434156, 542695, 868312, 1085390, 2170780, 2713475, 4341560, 5426950, 10853900, 21707800]

約数ペア:

[(1, 21707800), (2, 10853900), (4, 5426950), (5, 4341560), (8, 2713475), (10, 2170780), (20, 1085390), (25, 868312), (40, 542695), (50, 434156), (100, 217078), (200, 108539), (311, 69800), (349, 62200), (622, 34900), (698, 31100), (1244, 17450), (1396, 15550), (1555, 13960), (1745, 12440), (2488, 8725), (2792, 7775), (3110, 6980), (3490, 6220)]