21191877

素因数分解:

$3^2\times 7^1\times {\mathrm{17}}^1\times {\mathrm{47}}^1\times {\mathrm{421}}^1$

素因数の和:498

約数の個数: 48

約数和(自身を含む): 37919232

約数和(自身を除く): 16727355

約数列:

[1, 3, 7, 9, 17, 21, 47, 51, 63, 119, 141, 153, 329, 357, 421, 423, 799, 987, 1071, 1263, 2397, 2947, 2961, 3789, 5593, 7157, 7191, 8841, 16779, 19787, 21471, 26523, 50099, 50337, 59361, 64413, 138509, 150297, 178083, 336379, 415527, 450891, 1009137, 1246581, 2354653, 3027411, 7063959, 21191877]

約数ペア:

[(1, 21191877), (3, 7063959), (7, 3027411), (9, 2354653), (17, 1246581), (21, 1009137), (47, 450891), (51, 415527), (63, 336379), (119, 178083), (141, 150297), (153, 138509), (329, 64413), (357, 59361), (421, 50337), (423, 50099), (799, 26523), (987, 21471), (1071, 19787), (1263, 16779), (2397, 8841), (2947, 7191), (2961, 7157), (3789, 5593)]