28105720

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1063}}^1$

素因数の和:1735

約数の個数: 32

約数和(自身を含む): 63393120

約数和(自身を除く): 35287400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 1063, 1322, 2126, 2644, 3305, 4252, 5288, 5315, 6610, 8504, 10630, 13220, 21260, 26440, 42520, 702643, 1405286, 2810572, 3513215, 5621144, 7026430, 14052860, 28105720]

約数ペア:

[(1, 28105720), (2, 14052860), (4, 7026430), (5, 5621144), (8, 3513215), (10, 2810572), (20, 1405286), (40, 702643), (661, 42520), (1063, 26440), (1322, 21260), (2126, 13220), (2644, 10630), (3305, 8504), (4252, 6610), (5288, 5315)]