21978828

素因数分解:

$2^2\times 3^2\times {\mathrm{610523}}^1$

素因数の和:610533

約数の個数: 18

約数和(自身を含む): 55557684

約数和(自身を除く): 33578856

約数列:

[1, 2, 3, 4, 6, 9, 12, 18, 36, 610523, 1221046, 1831569, 2442092, 3663138, 5494707, 7326276, 10989414, 21978828]

約数ペア:

[(1, 21978828), (2, 10989414), (3, 7326276), (4, 5494707), (6, 3663138), (9, 2442092), (12, 1831569), (18, 1221046), (36, 610523)]