21060981

素因数分解:

$3^2\times {\mathrm{53}}^1\times {\mathrm{67}}^1\times {\mathrm{659}}^1$

素因数の和:785

約数の個数: 24

約数和(自身を含む): 31505760

約数和(自身を除く): 10444779

約数列:

[1, 3, 9, 53, 67, 159, 201, 477, 603, 659, 1977, 3551, 5931, 10653, 31959, 34927, 44153, 104781, 132459, 314343, 397377, 2340109, 7020327, 21060981]

約数ペア:

[(1, 21060981), (3, 7020327), (9, 2340109), (53, 397377), (67, 314343), (159, 132459), (201, 104781), (477, 44153), (603, 34927), (659, 31959), (1977, 10653), (3551, 5931)]