19987695

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{1627}}^1$

素因数の和:1661

約数の個数: 64

約数和(自身を含む): 43760640

約数和(自身を除く): 23772945

約数列:

[1, 3, 5, 7, 9, 13, 15, 21, 27, 35, 39, 45, 63, 65, 91, 105, 117, 135, 189, 195, 273, 315, 351, 455, 585, 819, 945, 1365, 1627, 1755, 2457, 4095, 4881, 8135, 11389, 12285, 14643, 21151, 24405, 34167, 43929, 56945, 63453, 73215, 102501, 105755, 148057, 170835, 190359, 219645, 307503, 317265, 444171, 512505, 571077, 740285, 951795, 1332513, 1537515, 2220855, 2855385, 3997539, 6662565, 19987695]

約数ペア:

[(1, 19987695), (3, 6662565), (5, 3997539), (7, 2855385), (9, 2220855), (13, 1537515), (15, 1332513), (21, 951795), (27, 740285), (35, 571077), (39, 512505), (45, 444171), (63, 317265), (65, 307503), (91, 219645), (105, 190359), (117, 170835), (135, 148057), (189, 105755), (195, 102501), (273, 73215), (315, 63453), (351, 56945), (455, 43929), (585, 34167), (819, 24405), (945, 21151), (1365, 14643), (1627, 12285), (1755, 11389), (2457, 8135), (4095, 4881)]