19808120

素因数分解:

$2^3\times 5^1\times {\mathrm{101}}^1\times {\mathrm{4903}}^1$

素因数の和:5015

約数の個数: 32

約数和(自身を含む): 45018720

約数和(自身を除く): 25210600

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 101, 202, 404, 505, 808, 1010, 2020, 4040, 4903, 9806, 19612, 24515, 39224, 49030, 98060, 196120, 495203, 990406, 1980812, 2476015, 3961624, 4952030, 9904060, 19808120]

約数ペア:

[(1, 19808120), (2, 9904060), (4, 4952030), (5, 3961624), (8, 2476015), (10, 1980812), (20, 990406), (40, 495203), (101, 196120), (202, 98060), (404, 49030), (505, 39224), (808, 24515), (1010, 19612), (2020, 9806), (4040, 4903)]