20899983

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{59}}^1\times {\mathrm{293}}^1$

素因数の和:399

約数の個数: 32

約数和(自身を含む): 31610880

約数和(自身を除く): 10710897

約数列:

[1, 3, 13, 31, 39, 59, 93, 177, 293, 403, 767, 879, 1209, 1829, 2301, 3809, 5487, 9083, 11427, 17287, 23777, 27249, 51861, 71331, 118079, 224731, 354237, 535897, 674193, 1607691, 6966661, 20899983]

約数ペア:

[(1, 20899983), (3, 6966661), (13, 1607691), (31, 674193), (39, 535897), (59, 354237), (93, 224731), (177, 118079), (293, 71331), (403, 51861), (767, 27249), (879, 23777), (1209, 17287), (1829, 11427), (2301, 9083), (3809, 5487)]