19841680

素因数分解:

$2^4\times 5^1\times {\mathrm{248021}}^1$

素因数の和:248034

約数の個数: 20

約数和(自身を含む): 46132092

約数和(自身を除く): 26290412

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 248021, 496042, 992084, 1240105, 1984168, 2480210, 3968336, 4960420, 9920840, 19841680]

約数ペア:

[(1, 19841680), (2, 9920840), (4, 4960420), (5, 3968336), (8, 2480210), (10, 1984168), (16, 1240105), (20, 992084), (40, 496042), (80, 248021)]