20901748

素因数分解:

$2^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{101}}^1\times {\mathrm{389}}^1$

素因数の和:520

約数の個数: 48

約数和(自身を含む): 44553600

約数和(自身を除く): 23651852

約数列:

[1, 2, 4, 7, 14, 19, 28, 38, 76, 101, 133, 202, 266, 389, 404, 532, 707, 778, 1414, 1556, 1919, 2723, 2828, 3838, 5446, 7391, 7676, 10892, 13433, 14782, 26866, 29564, 39289, 51737, 53732, 78578, 103474, 157156, 206948, 275023, 550046, 746491, 1100092, 1492982, 2985964, 5225437, 10450874, 20901748]

約数ペア:

[(1, 20901748), (2, 10450874), (4, 5225437), (7, 2985964), (14, 1492982), (19, 1100092), (28, 746491), (38, 550046), (76, 275023), (101, 206948), (133, 157156), (202, 103474), (266, 78578), (389, 53732), (404, 51737), (532, 39289), (707, 29564), (778, 26866), (1414, 14782), (1556, 13433), (1919, 10892), (2723, 7676), (2828, 7391), (3838, 5446)]