20153540

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{101}}^1\times {\mathrm{907}}^1$

素因数の和:1028

約数の個数: 48

約数和(自身を含む): 46678464

約数和(自身を除く): 26524924

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 101, 110, 202, 220, 404, 505, 907, 1010, 1111, 1814, 2020, 2222, 3628, 4444, 4535, 5555, 9070, 9977, 11110, 18140, 19954, 22220, 39908, 49885, 91607, 99770, 183214, 199540, 366428, 458035, 916070, 1007677, 1832140, 2015354, 4030708, 5038385, 10076770, 20153540]

約数ペア:

[(1, 20153540), (2, 10076770), (4, 5038385), (5, 4030708), (10, 2015354), (11, 1832140), (20, 1007677), (22, 916070), (44, 458035), (55, 366428), (101, 199540), (110, 183214), (202, 99770), (220, 91607), (404, 49885), (505, 39908), (907, 22220), (1010, 19954), (1111, 18140), (1814, 11110), (2020, 9977), (2222, 9070), (3628, 5555), (4444, 4535)]