21400897

素因数分解:

$7^2\times {\mathrm{19}}^1\times {\mathrm{127}}^1\times {\mathrm{181}}^1$

素因数の和:341

約数の個数: 24

約数和(自身を含む): 26557440

約数和(自身を除く): 5156543

約数列:

[1, 7, 19, 49, 127, 133, 181, 889, 931, 1267, 2413, 3439, 6223, 8869, 16891, 22987, 24073, 118237, 160909, 168511, 436753, 1126363, 3057271, 21400897]

約数ペア:

[(1, 21400897), (7, 3057271), (19, 1126363), (49, 436753), (127, 168511), (133, 160909), (181, 118237), (889, 24073), (931, 22987), (1267, 16891), (2413, 8869), (3439, 6223)]