20070128

素因数分解:

$2^4\times {\mathrm{13}}^1\times {\mathrm{47}}^1\times {\mathrm{2053}}^1$

素因数の和:2121

約数の個数: 40

約数和(自身を含む): 42788928

約数和(自身を除く): 22718800

約数列:

[1, 2, 4, 8, 13, 16, 26, 47, 52, 94, 104, 188, 208, 376, 611, 752, 1222, 2053, 2444, 4106, 4888, 8212, 9776, 16424, 26689, 32848, 53378, 96491, 106756, 192982, 213512, 385964, 427024, 771928, 1254383, 1543856, 2508766, 5017532, 10035064, 20070128]

約数ペア:

[(1, 20070128), (2, 10035064), (4, 5017532), (8, 2508766), (13, 1543856), (16, 1254383), (26, 771928), (47, 427024), (52, 385964), (94, 213512), (104, 192982), (188, 106756), (208, 96491), (376, 53378), (611, 32848), (752, 26689), (1222, 16424), (2053, 9776), (2444, 8212), (4106, 4888)]