78129820

素因数分解:

$2^2\times 5^1\times {\mathrm{71}}^1\times {\mathrm{55021}}^1$

素因数の和:55101

約数の個数: 24

約数和(自身を含む): 166386528

約数和(自身を除く): 88256708

約数列:

[1, 2, 4, 5, 10, 20, 71, 142, 284, 355, 710, 1420, 55021, 110042, 220084, 275105, 550210, 1100420, 3906491, 7812982, 15625964, 19532455, 39064910, 78129820]

約数ペア:

[(1, 78129820), (2, 39064910), (4, 19532455), (5, 15625964), (10, 7812982), (20, 3906491), (71, 1100420), (142, 550210), (284, 275105), (355, 220084), (710, 110042), (1420, 55021)]