19808560

素因数分解:

$2^4\times 5^1\times {\mathrm{247607}}^1$

素因数の和:247620

約数の個数: 20

約数和(自身を含む): 46055088

約数和(自身を除く): 26246528

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 247607, 495214, 990428, 1238035, 1980856, 2476070, 3961712, 4952140, 9904280, 19808560]

約数ペア:

[(1, 19808560), (2, 9904280), (4, 4952140), (5, 3961712), (8, 2476070), (10, 1980856), (16, 1238035), (20, 990428), (40, 495214), (80, 247607)]