21971391

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{149}}^1\times {\mathrm{199}}^1$

素因数の和:383

約数の個数: 32

約数和(自身を含む): 33600000

約数和(自身を除く): 11628609

約数列:

[1, 3, 13, 19, 39, 57, 149, 199, 247, 447, 597, 741, 1937, 2587, 2831, 3781, 5811, 7761, 8493, 11343, 29651, 36803, 49153, 88953, 110409, 147459, 385463, 563369, 1156389, 1690107, 7323797, 21971391]

約数ペア:

[(1, 21971391), (3, 7323797), (13, 1690107), (19, 1156389), (39, 563369), (57, 385463), (149, 147459), (199, 110409), (247, 88953), (447, 49153), (597, 36803), (741, 29651), (1937, 11343), (2587, 8493), (2831, 7761), (3781, 5811)]