21031278

素因数分解:

$2^1\times 3^1\times {\mathrm{17}}^1\times {\mathrm{41}}^1\times {\mathrm{47}}^1\times {\mathrm{107}}^1$

素因数の和:217

約数の個数: 64

約数和(自身を含む): 47029248

約数和(自身を除く): 25997970

約数列:

[1, 2, 3, 6, 17, 34, 41, 47, 51, 82, 94, 102, 107, 123, 141, 214, 246, 282, 321, 642, 697, 799, 1394, 1598, 1819, 1927, 2091, 2397, 3638, 3854, 4182, 4387, 4794, 5029, 5457, 5781, 8774, 10058, 10914, 11562, 13161, 15087, 26322, 30174, 32759, 65518, 74579, 85493, 98277, 149158, 170986, 196554, 206189, 223737, 256479, 412378, 447474, 512958, 618567, 1237134, 3505213, 7010426, 10515639, 21031278]

約数ペア:

[(1, 21031278), (2, 10515639), (3, 7010426), (6, 3505213), (17, 1237134), (34, 618567), (41, 512958), (47, 447474), (51, 412378), (82, 256479), (94, 223737), (102, 206189), (107, 196554), (123, 170986), (141, 149158), (214, 98277), (246, 85493), (282, 74579), (321, 65518), (642, 32759), (697, 30174), (799, 26322), (1394, 15087), (1598, 13161), (1819, 11562), (1927, 10914), (2091, 10058), (2397, 8774), (3638, 5781), (3854, 5457), (4182, 5029), (4387, 4794)]