28863219

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^2\times {\mathrm{37}}^1\times {\mathrm{307}}^1$

素因数の和:376

約数の個数: 48

約数和(自身を含む): 49812224

約数和(自身を除く): 20949005

約数列:

[1, 3, 7, 11, 21, 33, 37, 77, 111, 121, 231, 259, 307, 363, 407, 777, 847, 921, 1221, 2149, 2541, 2849, 3377, 4477, 6447, 8547, 10131, 11359, 13431, 23639, 31339, 34077, 37147, 70917, 79513, 94017, 111441, 124949, 238539, 260029, 374847, 780087, 874643, 1374439, 2623929, 4123317, 9621073, 28863219]

約数ペア:

[(1, 28863219), (3, 9621073), (7, 4123317), (11, 2623929), (21, 1374439), (33, 874643), (37, 780087), (77, 374847), (111, 260029), (121, 238539), (231, 124949), (259, 111441), (307, 94017), (363, 79513), (407, 70917), (777, 37147), (847, 34077), (921, 31339), (1221, 23639), (2149, 13431), (2541, 11359), (2849, 10131), (3377, 8547), (4477, 6447)]