21931119

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4903}}^1$

素因数の和:4987

約数の個数: 24

約数和(自身を含む): 36721152

約数和(自身を除く): 14790033

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4903, 14709, 34321, 44127, 102963, 308889, 348113, 1044339, 2436791, 3133017, 7310373, 21931119]

約数ペア:

[(1, 21931119), (3, 7310373), (7, 3133017), (9, 2436791), (21, 1044339), (63, 348113), (71, 308889), (213, 102963), (497, 44127), (639, 34321), (1491, 14709), (4473, 4903)]