21465135

素因数分解:

$3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{199}}^1$

素因数の和:277

約数の個数: 64

約数和(自身を含む): 41472000

約数和(自身を除く): 20006865

約数列:

[1, 3, 5, 9, 15, 17, 27, 45, 47, 51, 85, 135, 141, 153, 199, 235, 255, 423, 459, 597, 705, 765, 799, 995, 1269, 1791, 2115, 2295, 2397, 2985, 3383, 3995, 5373, 6345, 7191, 8955, 9353, 10149, 11985, 16915, 21573, 26865, 28059, 30447, 35955, 46765, 50745, 84177, 91341, 107865, 140295, 152235, 159001, 252531, 420885, 456705, 477003, 795005, 1262655, 1431009, 2385015, 4293027, 7155045, 21465135]

約数ペア:

[(1, 21465135), (3, 7155045), (5, 4293027), (9, 2385015), (15, 1431009), (17, 1262655), (27, 795005), (45, 477003), (47, 456705), (51, 420885), (85, 252531), (135, 159001), (141, 152235), (153, 140295), (199, 107865), (235, 91341), (255, 84177), (423, 50745), (459, 46765), (597, 35955), (705, 30447), (765, 28059), (799, 26865), (995, 21573), (1269, 16915), (1791, 11985), (2115, 10149), (2295, 9353), (2397, 8955), (2985, 7191), (3383, 6345), (3995, 5373)]