20717120

素因数分解:

$2^6\times 5^1\times {\mathrm{101}}^1\times {\mathrm{641}}^1$

素因数の和:759

約数の個数: 56

約数和(自身を含む): 49898808

約数和(自身を除く): 29181688

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 64, 80, 101, 160, 202, 320, 404, 505, 641, 808, 1010, 1282, 1616, 2020, 2564, 3205, 3232, 4040, 5128, 6410, 6464, 8080, 10256, 12820, 16160, 20512, 25640, 32320, 41024, 51280, 64741, 102560, 129482, 205120, 258964, 323705, 517928, 647410, 1035856, 1294820, 2071712, 2589640, 4143424, 5179280, 10358560, 20717120]

約数ペア:

[(1, 20717120), (2, 10358560), (4, 5179280), (5, 4143424), (8, 2589640), (10, 2071712), (16, 1294820), (20, 1035856), (32, 647410), (40, 517928), (64, 323705), (80, 258964), (101, 205120), (160, 129482), (202, 102560), (320, 64741), (404, 51280), (505, 41024), (641, 32320), (808, 25640), (1010, 20512), (1282, 16160), (1616, 12820), (2020, 10256), (2564, 8080), (3205, 6464), (3232, 6410), (4040, 5128)]