19620580

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{20021}}^1$

素因数の和:20044

約数の個数: 36

約数和(自身を含む): 47932668

約数和(自身を除く): 28312088

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 49, 70, 98, 140, 196, 245, 490, 980, 20021, 40042, 80084, 100105, 140147, 200210, 280294, 400420, 560588, 700735, 981029, 1401470, 1962058, 2802940, 3924116, 4905145, 9810290, 19620580]

約数ペア:

[(1, 19620580), (2, 9810290), (4, 4905145), (5, 3924116), (7, 2802940), (10, 1962058), (14, 1401470), (20, 981029), (28, 700735), (35, 560588), (49, 400420), (70, 280294), (98, 200210), (140, 140147), (196, 100105), (245, 80084), (490, 40042), (980, 20021)]