78907720

素因数分解:

$2^3\times 5^1\times {\mathrm{397}}^1\times {\mathrm{4969}}^1$

素因数の和:5377

約数の個数: 32

約数和(自身を含む): 178025400

約数和(自身を除く): 99117680

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 397, 794, 1588, 1985, 3176, 3970, 4969, 7940, 9938, 15880, 19876, 24845, 39752, 49690, 99380, 198760, 1972693, 3945386, 7890772, 9863465, 15781544, 19726930, 39453860, 78907720]

約数ペア:

[(1, 78907720), (2, 39453860), (4, 19726930), (5, 15781544), (8, 9863465), (10, 7890772), (20, 3945386), (40, 1972693), (397, 198760), (794, 99380), (1588, 49690), (1985, 39752), (3176, 24845), (3970, 19876), (4969, 15880), (7940, 9938)]