20958561

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{29}}^2\times {\mathrm{71}}^1$

素因数の和:151

約数の個数: 48

約数和(自身を含む): 35118720

約数和(自身を除く): 14160159

約数列:

[1, 3, 9, 13, 27, 29, 39, 71, 87, 117, 213, 261, 351, 377, 639, 783, 841, 923, 1131, 1917, 2059, 2523, 2769, 3393, 6177, 7569, 8307, 10179, 10933, 18531, 22707, 24921, 26767, 32799, 55593, 59711, 80301, 98397, 179133, 240903, 295191, 537399, 722709, 776243, 1612197, 2328729, 6986187, 20958561]

約数ペア:

[(1, 20958561), (3, 6986187), (9, 2328729), (13, 1612197), (27, 776243), (29, 722709), (39, 537399), (71, 295191), (87, 240903), (117, 179133), (213, 98397), (261, 80301), (351, 59711), (377, 55593), (639, 32799), (783, 26767), (841, 24921), (923, 22707), (1131, 18531), (1917, 10933), (2059, 10179), (2523, 8307), (2769, 7569), (3393, 6177)]