21215894

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{47}}^1\times {\mathrm{1697}}^1$

素因数の和:1772

約数の個数: 32

約数和(自身を含む): 39121920

約数和(自身を除く): 17906026

約数列:

[1, 2, 7, 14, 19, 38, 47, 94, 133, 266, 329, 658, 893, 1697, 1786, 3394, 6251, 11879, 12502, 23758, 32243, 64486, 79759, 159518, 225701, 451402, 558313, 1116626, 1515421, 3030842, 10607947, 21215894]

約数ペア:

[(1, 21215894), (2, 10607947), (7, 3030842), (14, 1515421), (19, 1116626), (38, 558313), (47, 451402), (94, 225701), (133, 159518), (266, 79759), (329, 64486), (658, 32243), (893, 23758), (1697, 12502), (1786, 11879), (3394, 6251)]