21473991

素因数分解:

$3^4\times 7^1\times {\mathrm{11}}^2\times {\mathrm{313}}^1$

素因数の和:354

約数の個数: 60

約数和(自身を含む): 40425616

約数和(自身を除く): 18951625

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 63, 77, 81, 99, 121, 189, 231, 297, 313, 363, 567, 693, 847, 891, 939, 1089, 2079, 2191, 2541, 2817, 3267, 3443, 6237, 6573, 7623, 8451, 9801, 10329, 19719, 22869, 24101, 25353, 30987, 37873, 59157, 68607, 72303, 92961, 113619, 177471, 216909, 265111, 278883, 340857, 650727, 795333, 1022571, 1952181, 2385999, 3067713, 7157997, 21473991]

約数ペア:

[(1, 21473991), (3, 7157997), (7, 3067713), (9, 2385999), (11, 1952181), (21, 1022571), (27, 795333), (33, 650727), (63, 340857), (77, 278883), (81, 265111), (99, 216909), (121, 177471), (189, 113619), (231, 92961), (297, 72303), (313, 68607), (363, 59157), (567, 37873), (693, 30987), (847, 25353), (891, 24101), (939, 22869), (1089, 19719), (2079, 10329), (2191, 9801), (2541, 8451), (2817, 7623), (3267, 6573), (3443, 6237)]