78909980

素因数分解:

$2^2\times 5^1\times {\mathrm{193}}^1\times {\mathrm{20443}}^1$

素因数の和:20645

約数の個数: 24

約数和(自身を含む): 166577712

約数和(自身を除く): 87667732

約数列:

[1, 2, 4, 5, 10, 20, 193, 386, 772, 965, 1930, 3860, 20443, 40886, 81772, 102215, 204430, 408860, 3945499, 7890998, 15781996, 19727495, 39454990, 78909980]

約数ペア:

[(1, 78909980), (2, 39454990), (4, 19727495), (5, 15781996), (10, 7890998), (20, 3945499), (193, 408860), (386, 204430), (772, 102215), (965, 81772), (1930, 40886), (3860, 20443)]