28779940

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{311}}^1\times {\mathrm{661}}^1$

素因数の和:988

約数の個数: 48

約数和(自身を含む): 69398784

約数和(自身を除く): 40618844

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 311, 622, 661, 1244, 1322, 1555, 2177, 2644, 3110, 3305, 4354, 4627, 6220, 6610, 8708, 9254, 10885, 13220, 18508, 21770, 23135, 43540, 46270, 92540, 205571, 411142, 822284, 1027855, 1438997, 2055710, 2877994, 4111420, 5755988, 7194985, 14389970, 28779940]

約数ペア:

[(1, 28779940), (2, 14389970), (4, 7194985), (5, 5755988), (7, 4111420), (10, 2877994), (14, 2055710), (20, 1438997), (28, 1027855), (35, 822284), (70, 411142), (140, 205571), (311, 92540), (622, 46270), (661, 43540), (1244, 23135), (1322, 21770), (1555, 18508), (2177, 13220), (2644, 10885), (3110, 9254), (3305, 8708), (4354, 6610), (4627, 6220)]