21785001

素因数分解:

$3^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{769}}^1$

素因数の和:869

約数の個数: 32

約数和(自身を含む): 35481600

約数和(自身を除く): 13696599

約数列:

[1, 3, 7, 19, 21, 57, 71, 133, 213, 399, 497, 769, 1349, 1491, 2307, 4047, 5383, 9443, 14611, 16149, 28329, 43833, 54599, 102277, 163797, 306831, 382193, 1037381, 1146579, 3112143, 7261667, 21785001]

約数ペア:

[(1, 21785001), (3, 7261667), (7, 3112143), (19, 1146579), (21, 1037381), (57, 382193), (71, 306831), (133, 163797), (213, 102277), (399, 54599), (497, 43833), (769, 28329), (1349, 16149), (1491, 14611), (2307, 9443), (4047, 5383)]