19897720

素因数分解:

$2^3\times 5^1\times {\mathrm{107}}^1\times {\mathrm{4649}}^1$

素因数の和:4767

約数の個数: 32

約数和(自身を含む): 45198000

約数和(自身を除く): 25300280

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 107, 214, 428, 535, 856, 1070, 2140, 4280, 4649, 9298, 18596, 23245, 37192, 46490, 92980, 185960, 497443, 994886, 1989772, 2487215, 3979544, 4974430, 9948860, 19897720]

約数ペア:

[(1, 19897720), (2, 9948860), (4, 4974430), (5, 3979544), (8, 2487215), (10, 1989772), (20, 994886), (40, 497443), (107, 185960), (214, 92980), (428, 46490), (535, 37192), (856, 23245), (1070, 18596), (2140, 9298), (4280, 4649)]