21488425

素因数分解:

$5^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{31}}^1\times {\mathrm{233}}^1$

素因数の和:298

約数の個数: 48

約数和(自身を含む): 33426432

約数和(自身を除く): 11938007

約数列:

[1, 5, 7, 17, 25, 31, 35, 85, 119, 155, 175, 217, 233, 425, 527, 595, 775, 1085, 1165, 1631, 2635, 2975, 3689, 3961, 5425, 5825, 7223, 8155, 13175, 18445, 19805, 27727, 36115, 40775, 50561, 92225, 99025, 122791, 138635, 180575, 252805, 613955, 693175, 859537, 1264025, 3069775, 4297685, 21488425]

約数ペア:

[(1, 21488425), (5, 4297685), (7, 3069775), (17, 1264025), (25, 859537), (31, 693175), (35, 613955), (85, 252805), (119, 180575), (155, 138635), (175, 122791), (217, 99025), (233, 92225), (425, 50561), (527, 40775), (595, 36115), (775, 27727), (1085, 19805), (1165, 18445), (1631, 13175), (2635, 8155), (2975, 7223), (3689, 5825), (3961, 5425)]