20563389

素因数分解:

$3^5\times 7^2\times {\mathrm{11}}^1\times {\mathrm{157}}^1$

素因数の和:197

約数の個数: 72

約数和(自身を含む): 39338208

約数和(自身を除く): 18774819

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 49, 63, 77, 81, 99, 147, 157, 189, 231, 243, 297, 441, 471, 539, 567, 693, 891, 1099, 1323, 1413, 1617, 1701, 1727, 2079, 2673, 3297, 3969, 4239, 4851, 5181, 6237, 7693, 9891, 11907, 12089, 12717, 14553, 15543, 18711, 23079, 29673, 36267, 38151, 43659, 46629, 69237, 84623, 89019, 108801, 130977, 139887, 207711, 253869, 267057, 326403, 419661, 623133, 761607, 979209, 1869399, 2284821, 2937627, 6854463, 20563389]

約数ペア:

[(1, 20563389), (3, 6854463), (7, 2937627), (9, 2284821), (11, 1869399), (21, 979209), (27, 761607), (33, 623133), (49, 419661), (63, 326403), (77, 267057), (81, 253869), (99, 207711), (147, 139887), (157, 130977), (189, 108801), (231, 89019), (243, 84623), (297, 69237), (441, 46629), (471, 43659), (539, 38151), (567, 36267), (693, 29673), (891, 23079), (1099, 18711), (1323, 15543), (1413, 14553), (1617, 12717), (1701, 12089), (1727, 11907), (2079, 9891), (2673, 7693), (3297, 6237), (3969, 5181), (4239, 4851)]