19783784

素因数分解:

$2^3\times {\mathrm{17}}^2\times {\mathrm{43}}^1\times {\mathrm{199}}^1$

素因数の和:282

約数の個数: 48

約数和(自身を含む): 40524000

約数和(自身を除く): 20740216

約数列:

[1, 2, 4, 8, 17, 34, 43, 68, 86, 136, 172, 199, 289, 344, 398, 578, 731, 796, 1156, 1462, 1592, 2312, 2924, 3383, 5848, 6766, 8557, 12427, 13532, 17114, 24854, 27064, 34228, 49708, 57511, 68456, 99416, 115022, 145469, 230044, 290938, 460088, 581876, 1163752, 2472973, 4945946, 9891892, 19783784]

約数ペア:

[(1, 19783784), (2, 9891892), (4, 4945946), (8, 2472973), (17, 1163752), (34, 581876), (43, 460088), (68, 290938), (86, 230044), (136, 145469), (172, 115022), (199, 99416), (289, 68456), (344, 57511), (398, 49708), (578, 34228), (731, 27064), (796, 24854), (1156, 17114), (1462, 13532), (1592, 12427), (2312, 8557), (2924, 6766), (3383, 5848)]