28409780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{307}}^1\times {\mathrm{661}}^1$

素因数の和:984

約数の個数: 48

約数和(自身を含む): 68509056

約数和(自身を除く): 40099276

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 307, 614, 661, 1228, 1322, 1535, 2149, 2644, 3070, 3305, 4298, 4627, 6140, 6610, 8596, 9254, 10745, 13220, 18508, 21490, 23135, 42980, 46270, 92540, 202927, 405854, 811708, 1014635, 1420489, 2029270, 2840978, 4058540, 5681956, 7102445, 14204890, 28409780]

約数ペア:

[(1, 28409780), (2, 14204890), (4, 7102445), (5, 5681956), (7, 4058540), (10, 2840978), (14, 2029270), (20, 1420489), (28, 1014635), (35, 811708), (70, 405854), (140, 202927), (307, 92540), (614, 46270), (661, 42980), (1228, 23135), (1322, 21490), (1535, 18508), (2149, 13220), (2644, 10745), (3070, 9254), (3305, 8596), (4298, 6610), (4627, 6140)]