20994560

素因数分解:

$2^9\times 5^1\times {\mathrm{59}}^1\times {\mathrm{139}}^1$

素因数の和:221

約数の個数: 80

約数和(自身を含む): 51559200

約数和(自身を除く): 30564640

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 59, 64, 80, 118, 128, 139, 160, 236, 256, 278, 295, 320, 472, 512, 556, 590, 640, 695, 944, 1112, 1180, 1280, 1390, 1888, 2224, 2360, 2560, 2780, 3776, 4448, 4720, 5560, 7552, 8201, 8896, 9440, 11120, 15104, 16402, 17792, 18880, 22240, 30208, 32804, 35584, 37760, 41005, 44480, 65608, 71168, 75520, 82010, 88960, 131216, 151040, 164020, 177920, 262432, 328040, 355840, 524864, 656080, 1049728, 1312160, 2099456, 2624320, 4198912, 5248640, 10497280, 20994560]

約数ペア:

[(1, 20994560), (2, 10497280), (4, 5248640), (5, 4198912), (8, 2624320), (10, 2099456), (16, 1312160), (20, 1049728), (32, 656080), (40, 524864), (59, 355840), (64, 328040), (80, 262432), (118, 177920), (128, 164020), (139, 151040), (160, 131216), (236, 88960), (256, 82010), (278, 75520), (295, 71168), (320, 65608), (472, 44480), (512, 41005), (556, 37760), (590, 35584), (640, 32804), (695, 30208), (944, 22240), (1112, 18880), (1180, 17792), (1280, 16402), (1390, 15104), (1888, 11120), (2224, 9440), (2360, 8896), (2560, 8201), (2780, 7552), (3776, 5560), (4448, 4720)]