21480831

素因数分解:

$3^2\times {\mathrm{37}}^1\times {\mathrm{251}}^1\times {\mathrm{257}}^1$

素因数の和:551

約数の個数: 24

約数和(自身を含む): 32117904

約数和(自身を除く): 10637073

約数列:

[1, 3, 9, 37, 111, 251, 257, 333, 753, 771, 2259, 2313, 9287, 9509, 27861, 28527, 64507, 83583, 85581, 193521, 580563, 2386759, 7160277, 21480831]

約数ペア:

[(1, 21480831), (3, 7160277), (9, 2386759), (37, 580563), (111, 193521), (251, 85581), (257, 83583), (333, 64507), (753, 28527), (771, 27861), (2259, 9509), (2313, 9287)]