21686225

素因数分解:

$5^2\times {\mathrm{11}}^2\times {\mathrm{67}}^1\times {\mathrm{107}}^1$

素因数の和:206

約数の個数: 36

約数和(自身を含む): 30279312

約数和(自身を除く): 8593087

約数列:

[1, 5, 11, 25, 55, 67, 107, 121, 275, 335, 535, 605, 737, 1177, 1675, 2675, 3025, 3685, 5885, 7169, 8107, 12947, 18425, 29425, 35845, 40535, 64735, 78859, 179225, 202675, 323675, 394295, 867449, 1971475, 4337245, 21686225]

約数ペア:

[(1, 21686225), (5, 4337245), (11, 1971475), (25, 867449), (55, 394295), (67, 323675), (107, 202675), (121, 179225), (275, 78859), (335, 64735), (535, 40535), (605, 35845), (737, 29425), (1177, 18425), (1675, 12947), (2675, 8107), (3025, 7169), (3685, 5885)]