21479823

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{821}}^1$

素因数の和:869

約数の個数: 40

約数和(自身を含む): 35806320

約数和(自身を除く): 14326497

約数列:

[1, 3, 9, 17, 19, 27, 51, 57, 81, 153, 171, 323, 459, 513, 821, 969, 1377, 1539, 2463, 2907, 7389, 8721, 13957, 15599, 22167, 26163, 41871, 46797, 66501, 125613, 140391, 265183, 376839, 421173, 795549, 1130517, 1263519, 2386647, 7159941, 21479823]

約数ペア:

[(1, 21479823), (3, 7159941), (9, 2386647), (17, 1263519), (19, 1130517), (27, 795549), (51, 421173), (57, 376839), (81, 265183), (153, 140391), (171, 125613), (323, 66501), (459, 46797), (513, 41871), (821, 26163), (969, 22167), (1377, 15599), (1539, 13957), (2463, 8721), (2907, 7389)]