21805880

素因数分解:

$2^3\times 5^1\times {\mathrm{433}}^1\times {\mathrm{1259}}^1$

素因数の和:1703

約数の個数: 32

約数和(自身を含む): 49215600

約数和(自身を除く): 27409720

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 433, 866, 1259, 1732, 2165, 2518, 3464, 4330, 5036, 6295, 8660, 10072, 12590, 17320, 25180, 50360, 545147, 1090294, 2180588, 2725735, 4361176, 5451470, 10902940, 21805880]

約数ペア:

[(1, 21805880), (2, 10902940), (4, 5451470), (5, 4361176), (8, 2725735), (10, 2180588), (20, 1090294), (40, 545147), (433, 50360), (866, 25180), (1259, 17320), (1732, 12590), (2165, 10072), (2518, 8660), (3464, 6295), (4330, 5036)]