19998909

素因数分解:

$3^2\times 7^2\times {\mathrm{101}}^1\times {\mathrm{449}}^1$

素因数の和:570

約数の個数: 36

約数和(自身を含む): 34011900

約数和(自身を除く): 14012991

約数列:

[1, 3, 7, 9, 21, 49, 63, 101, 147, 303, 441, 449, 707, 909, 1347, 2121, 3143, 4041, 4949, 6363, 9429, 14847, 22001, 28287, 44541, 45349, 66003, 136047, 198009, 317443, 408141, 952329, 2222101, 2856987, 6666303, 19998909]

約数ペア:

[(1, 19998909), (3, 6666303), (7, 2856987), (9, 2222101), (21, 952329), (49, 408141), (63, 317443), (101, 198009), (147, 136047), (303, 66003), (441, 45349), (449, 44541), (707, 28287), (909, 22001), (1347, 14847), (2121, 9429), (3143, 6363), (4041, 4949)]