21379617

素因数分解:

$3^2\times 7^1\times {\mathrm{19}}^1\times {\mathrm{53}}^1\times {\mathrm{337}}^1$

素因数の和:422

約数の個数: 48

約数和(自身を含む): 37964160

約数和(自身を除く): 16584543

約数列:

[1, 3, 7, 9, 19, 21, 53, 57, 63, 133, 159, 171, 337, 371, 399, 477, 1007, 1011, 1113, 1197, 2359, 3021, 3033, 3339, 6403, 7049, 7077, 9063, 17861, 19209, 21147, 21231, 44821, 53583, 57627, 63441, 125027, 134463, 160749, 339359, 375081, 403389, 1018077, 1125243, 2375513, 3054231, 7126539, 21379617]

約数ペア:

[(1, 21379617), (3, 7126539), (7, 3054231), (9, 2375513), (19, 1125243), (21, 1018077), (53, 403389), (57, 375081), (63, 339359), (133, 160749), (159, 134463), (171, 125027), (337, 63441), (371, 57627), (399, 53583), (477, 44821), (1007, 21231), (1011, 21147), (1113, 19209), (1197, 17861), (2359, 9063), (3021, 7077), (3033, 7049), (3339, 6403)]