21878439

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{59}}^1\times {\mathrm{661}}^1$

素因数の和:751

約数の個数: 32

約数和(自身を含む): 34318080

約数和(自身を除く): 12439641

約数列:

[1, 3, 11, 17, 33, 51, 59, 177, 187, 561, 649, 661, 1003, 1947, 1983, 3009, 7271, 11033, 11237, 21813, 33099, 33711, 38999, 116997, 123607, 370821, 428989, 662983, 1286967, 1988949, 7292813, 21878439]

約数ペア:

[(1, 21878439), (3, 7292813), (11, 1988949), (17, 1286967), (33, 662983), (51, 428989), (59, 370821), (177, 123607), (187, 116997), (561, 38999), (649, 33711), (661, 33099), (1003, 21813), (1947, 11237), (1983, 11033), (3009, 7271)]