28420

素因数分解:

$2^2\times 5^1\times 7^2\times {\mathrm{29}}^1$

素因数の和:52

約数の個数: 36

約数和(自身を含む): 71820

約数和(自身を除く): 43400

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 29, 35, 49, 58, 70, 98, 116, 140, 145, 196, 203, 245, 290, 406, 490, 580, 812, 980, 1015, 1421, 2030, 2842, 4060, 5684, 7105, 14210, 28420]

約数ペア:

[(1, 28420), (2, 14210), (4, 7105), (5, 5684), (7, 4060), (10, 2842), (14, 2030), (20, 1421), (28, 1015), (29, 980), (35, 812), (49, 580), (58, 490), (70, 406), (98, 290), (116, 245), (140, 203), (145, 196)]