21852747

素因数分解:

$3^5\times 7^1\times {\mathrm{29}}^1\times {\mathrm{443}}^1$

素因数の和:494

約数の個数: 48

約数和(自身を含む): 38787840

約数和(自身を除く): 16935093

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 81, 87, 189, 203, 243, 261, 443, 567, 609, 783, 1329, 1701, 1827, 2349, 3101, 3987, 5481, 7047, 9303, 11961, 12847, 16443, 27909, 35883, 38541, 49329, 83727, 89929, 107649, 115623, 251181, 269787, 346869, 753543, 809361, 1040607, 2428083, 3121821, 7284249, 21852747]

約数ペア:

[(1, 21852747), (3, 7284249), (7, 3121821), (9, 2428083), (21, 1040607), (27, 809361), (29, 753543), (63, 346869), (81, 269787), (87, 251181), (189, 115623), (203, 107649), (243, 89929), (261, 83727), (443, 49329), (567, 38541), (609, 35883), (783, 27909), (1329, 16443), (1701, 12847), (1827, 11961), (2349, 9303), (3101, 7047), (3987, 5481)]