21005673

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{4241}}^1$

素因数の和:4384

約数の個数: 16

約数和(自身を含む): 30406656

約数和(自身を除く): 9400983

約数列:

[1, 3, 13, 39, 127, 381, 1651, 4241, 4953, 12723, 55133, 165399, 538607, 1615821, 7001891, 21005673]

約数ペア:

[(1, 21005673), (3, 7001891), (13, 1615821), (39, 538607), (127, 165399), (381, 55133), (1651, 12723), (4241, 4953)]