78620840

素因数分解:

$2^3\times 5^1\times {\mathrm{1965521}}^1$

素因数の和:1965532

約数の個数: 16

約数和(自身を含む): 176896980

約数和(自身を除く): 98276140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 1965521, 3931042, 7862084, 9827605, 15724168, 19655210, 39310420, 78620840]

約数ペア:

[(1, 78620840), (2, 39310420), (4, 19655210), (5, 15724168), (8, 9827605), (10, 7862084), (20, 3931042), (40, 1965521)]