20689515

素因数分解:

$3^2\times 5^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{853}}^1$

素因数の和:889

約数の個数: 72

約数和(自身を含む): 45562608

約数和(自身を除く): 24873093

約数列:

[1, 3, 5, 7, 9, 11, 15, 21, 33, 35, 45, 49, 55, 63, 77, 99, 105, 147, 165, 231, 245, 315, 385, 441, 495, 539, 693, 735, 853, 1155, 1617, 2205, 2559, 2695, 3465, 4265, 4851, 5971, 7677, 8085, 9383, 12795, 17913, 24255, 28149, 29855, 38385, 41797, 46915, 53739, 65681, 84447, 89565, 125391, 140745, 197043, 208985, 268695, 328405, 376173, 422235, 459767, 591129, 626955, 985215, 1379301, 1880865, 2298835, 2955645, 4137903, 6896505, 20689515]

約数ペア:

[(1, 20689515), (3, 6896505), (5, 4137903), (7, 2955645), (9, 2298835), (11, 1880865), (15, 1379301), (21, 985215), (33, 626955), (35, 591129), (45, 459767), (49, 422235), (55, 376173), (63, 328405), (77, 268695), (99, 208985), (105, 197043), (147, 140745), (165, 125391), (231, 89565), (245, 84447), (315, 65681), (385, 53739), (441, 46915), (495, 41797), (539, 38385), (693, 29855), (735, 28149), (853, 24255), (1155, 17913), (1617, 12795), (2205, 9383), (2559, 8085), (2695, 7677), (3465, 5971), (4265, 4851)]