28720940

素因数分解:

$2^2\times 5^1\times {\mathrm{107}}^1\times {\mathrm{13421}}^1$

素因数の和:13537

約数の個数: 24

約数和(自身を含む): 60882192

約数和(自身を除く): 32161252

約数列:

[1, 2, 4, 5, 10, 20, 107, 214, 428, 535, 1070, 2140, 13421, 26842, 53684, 67105, 134210, 268420, 1436047, 2872094, 5744188, 7180235, 14360470, 28720940]

約数ペア:

[(1, 28720940), (2, 14360470), (4, 7180235), (5, 5744188), (10, 2872094), (20, 1436047), (107, 268420), (214, 134210), (428, 67105), (535, 53684), (1070, 26842), (2140, 13421)]