21326571

素因数分解:

$3^4\times 7^1\times {\mathrm{29}}^1\times {\mathrm{1297}}^1$

素因数の和:1345

約数の個数: 40

約数和(自身を含む): 37693920

約数和(自身を除く): 16367349

約数列:

[1, 3, 7, 9, 21, 27, 29, 63, 81, 87, 189, 203, 261, 567, 609, 783, 1297, 1827, 2349, 3891, 5481, 9079, 11673, 16443, 27237, 35019, 37613, 81711, 105057, 112839, 245133, 263291, 338517, 735399, 789873, 1015551, 2369619, 3046653, 7108857, 21326571]

約数ペア:

[(1, 21326571), (3, 7108857), (7, 3046653), (9, 2369619), (21, 1015551), (27, 789873), (29, 735399), (63, 338517), (81, 263291), (87, 245133), (189, 112839), (203, 105057), (261, 81711), (567, 37613), (609, 35019), (783, 27237), (1297, 16443), (1827, 11673), (2349, 9079), (3891, 5481)]