20688640

素因数分解:

$2^8\times 5^1\times 7^1\times {\mathrm{2309}}^1$

素因数の和:2337

約数の個数: 72

約数和(自身を含む): 56659680

約数和(自身を除く): 35971040

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 40, 56, 64, 70, 80, 112, 128, 140, 160, 224, 256, 280, 320, 448, 560, 640, 896, 1120, 1280, 1792, 2240, 2309, 4480, 4618, 8960, 9236, 11545, 16163, 18472, 23090, 32326, 36944, 46180, 64652, 73888, 80815, 92360, 129304, 147776, 161630, 184720, 258608, 295552, 323260, 369440, 517216, 591104, 646520, 738880, 1034432, 1293040, 1477760, 2068864, 2586080, 2955520, 4137728, 5172160, 10344320, 20688640]

約数ペア:

[(1, 20688640), (2, 10344320), (4, 5172160), (5, 4137728), (7, 2955520), (8, 2586080), (10, 2068864), (14, 1477760), (16, 1293040), (20, 1034432), (28, 738880), (32, 646520), (35, 591104), (40, 517216), (56, 369440), (64, 323260), (70, 295552), (80, 258608), (112, 184720), (128, 161630), (140, 147776), (160, 129304), (224, 92360), (256, 80815), (280, 73888), (320, 64652), (448, 46180), (560, 36944), (640, 32326), (896, 23090), (1120, 18472), (1280, 16163), (1792, 11545), (2240, 9236), (2309, 8960), (4480, 4618)]