20512781261

素因数分解:

$7^3\times {\mathrm{79}}^1\times {\mathrm{521}}^1\times {\mathrm{1453}}^1$

素因数の和:2074

約数の個数: 32

約数和(自身を含む): 24287616000

約数和(自身を除く): 3774834739

約数列:

[1, 7, 49, 79, 343, 521, 553, 1453, 3647, 3871, 10171, 25529, 27097, 41159, 71197, 114787, 178703, 288113, 498379, 757013, 803509, 2016791, 5299091, 5624563, 14117537, 37093637, 39371941, 59804027, 259655459, 418628189, 2930397323, 20512781261]

約数ペア:

[(1, 20512781261), (7, 2930397323), (49, 418628189), (79, 259655459), (343, 59804027), (521, 39371941), (553, 37093637), (1453, 14117537), (3647, 5624563), (3871, 5299091), (10171, 2016791), (25529, 803509), (27097, 757013), (41159, 498379), (71197, 288113), (114787, 178703)]