20681163

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{23}}^1\times {\mathrm{653}}^1$

素因数の和:705

約数の個数: 40

約数和(自身を含む): 34185888

約数和(自身を除く): 13504725

約数列:

[1, 3, 9, 17, 23, 27, 51, 69, 81, 153, 207, 391, 459, 621, 653, 1173, 1377, 1863, 1959, 3519, 5877, 10557, 11101, 15019, 17631, 31671, 33303, 45057, 52893, 99909, 135171, 255323, 299727, 405513, 765969, 899181, 1216539, 2297907, 6893721, 20681163]

約数ペア:

[(1, 20681163), (3, 6893721), (9, 2297907), (17, 1216539), (23, 899181), (27, 765969), (51, 405513), (69, 299727), (81, 255323), (153, 135171), (207, 99909), (391, 52893), (459, 45057), (621, 33303), (653, 31671), (1173, 17631), (1377, 15019), (1863, 11101), (1959, 10557), (3519, 5877)]