21202015

素因数分解:

$5^1\times {\mathrm{127}}^1\times {\mathrm{173}}^1\times {\mathrm{193}}^1$

素因数の和:498

約数の個数: 16

約数和(自身を含む): 25924608

約数和(自身を除く): 4722593

約数列:

[1, 5, 127, 173, 193, 635, 865, 965, 21971, 24511, 33389, 109855, 122555, 166945, 4240403, 21202015]

約数ペア:

[(1, 21202015), (5, 4240403), (127, 166945), (173, 122555), (193, 109855), (635, 33389), (865, 24511), (965, 21971)]