21000939957

素因数分解:

$3^3\times {\mathrm{73}}^1\times {\mathrm{79}}^1\times {\mathrm{134873}}^1$

素因数の和:135034

約数の個数: 32

約数和(自身を含む): 31938163200

約数和(自身を除く): 10937223243

約数列:

[1, 3, 9, 27, 73, 79, 219, 237, 657, 711, 1971, 2133, 5767, 17301, 51903, 134873, 155709, 404619, 1213857, 3641571, 9845729, 10654967, 29537187, 31964901, 88611561, 95894703, 265834683, 287684109, 777812591, 2333437773, 7000313319, 21000939957]

約数ペア:

[(1, 21000939957), (3, 7000313319), (9, 2333437773), (27, 777812591), (73, 287684109), (79, 265834683), (219, 95894703), (237, 88611561), (657, 31964901), (711, 29537187), (1971, 10654967), (2133, 9845729), (5767, 3641571), (17301, 1213857), (51903, 404619), (134873, 155709)]