19701520

素因数分解:

$2^4\times 5^1\times {\mathrm{383}}^1\times {\mathrm{643}}^1$

素因数の和:1039

約数の個数: 40

約数和(自身を含む): 45997056

約数和(自身を除く): 26295536

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 383, 643, 766, 1286, 1532, 1915, 2572, 3064, 3215, 3830, 5144, 6128, 6430, 7660, 10288, 12860, 15320, 25720, 30640, 51440, 246269, 492538, 985076, 1231345, 1970152, 2462690, 3940304, 4925380, 9850760, 19701520]

約数ペア:

[(1, 19701520), (2, 9850760), (4, 4925380), (5, 3940304), (8, 2462690), (10, 1970152), (16, 1231345), (20, 985076), (40, 492538), (80, 246269), (383, 51440), (643, 30640), (766, 25720), (1286, 15320), (1532, 12860), (1915, 10288), (2572, 7660), (3064, 6430), (3215, 6128), (3830, 5144)]