21191709

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{199}}^1\times {\mathrm{461}}^1$

素因数の和:681

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 14289891

約数列:

[1, 3, 7, 11, 21, 33, 77, 199, 231, 461, 597, 1383, 1393, 2189, 3227, 4179, 5071, 6567, 9681, 15213, 15323, 35497, 45969, 91739, 106491, 275217, 642173, 1009129, 1926519, 3027387, 7063903, 21191709]

約数ペア:

[(1, 21191709), (3, 7063903), (7, 3027387), (11, 1926519), (21, 1009129), (33, 642173), (77, 275217), (199, 106491), (231, 91739), (461, 45969), (597, 35497), (1383, 15323), (1393, 15213), (2189, 9681), (3227, 6567), (4179, 5071)]