78341720

素因数分解:

$2^3\times 5^1\times {\mathrm{661}}^1\times {\mathrm{2963}}^1$

素因数の和:3635

約数の個数: 32

約数和(自身を含む): 176595120

約数和(自身を除く): 98253400

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 661, 1322, 2644, 2963, 3305, 5288, 5926, 6610, 11852, 13220, 14815, 23704, 26440, 29630, 59260, 118520, 1958543, 3917086, 7834172, 9792715, 15668344, 19585430, 39170860, 78341720]

約数ペア:

[(1, 78341720), (2, 39170860), (4, 19585430), (5, 15668344), (8, 9792715), (10, 7834172), (20, 3917086), (40, 1958543), (661, 118520), (1322, 59260), (2644, 29630), (2963, 26440), (3305, 23704), (5288, 14815), (5926, 13220), (6610, 11852)]